diff --git a/core/lib/Drupal/Core/Field/Plugin/migrate/field/Email.php b/core/lib/Drupal/Core/Field/Plugin/migrate/field/Email.php
index 11226fa649bd2adfdb22ecec24cec89b74e333e9..f56a6f844b0ff2e4651ad316d74d38268cc6520d 100644
--- a/core/lib/Drupal/Core/Field/Plugin/migrate/field/Email.php
+++ b/core/lib/Drupal/Core/Field/Plugin/migrate/field/Email.php
@@ -46,7 +46,7 @@ public function getFieldFormatterMap() {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'sub_process',
       'source' => $field_name,
diff --git a/core/modules/comment/src/Plugin/migrate/D7Comment.php b/core/modules/comment/src/Plugin/migrate/D7Comment.php
index 77a7dca61fed65bcd30ec5ca470bd3387850ecbd..9a509f4b23135ffb1a851468626abe87ee8acc42 100644
--- a/core/modules/comment/src/Plugin/migrate/D7Comment.php
+++ b/core/modules/comment/src/Plugin/migrate/D7Comment.php
@@ -35,7 +35,7 @@ public function getProcess() {
           $this->fieldPluginCache[$field_type] = $this->fieldPluginManager->createInstance($field_type, [], $this);
         }
         $info = $row->getSource();
-        $this->fieldPluginCache[$field_type]->processFieldValues($this, $field_name, $info);
+        $this->fieldPluginCache[$field_type]->defineValueProcessPipeline($this, $field_name, $info);
       }
       else {
         $this->setProcessOfProperty($field_name, $field_name);
diff --git a/core/modules/datetime/src/Plugin/migrate/field/DateField.php b/core/modules/datetime/src/Plugin/migrate/field/DateField.php
index 446076232f73a7f31b4277f752eeceb9cb3a26b0..876c9da09b636bb4e30f91830aa5878d4150bcee 100644
--- a/core/modules/datetime/src/Plugin/migrate/field/DateField.php
+++ b/core/modules/datetime/src/Plugin/migrate/field/DateField.php
@@ -44,7 +44,7 @@ public function getFieldWidgetMap() {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     switch ($data['type']) {
       case 'date':
         $from_format = 'Y-m-d\TH:i:s';
diff --git a/core/modules/datetime/src/Plugin/migrate/field/d6/DateField.php b/core/modules/datetime/src/Plugin/migrate/field/d6/DateField.php
index 4e7cd881d30cdffee764b105dc9db8b630e47ab8..7ea04b9de6a3f090649351d9d531d040e066e912 100644
--- a/core/modules/datetime/src/Plugin/migrate/field/d6/DateField.php
+++ b/core/modules/datetime/src/Plugin/migrate/field/d6/DateField.php
@@ -40,7 +40,7 @@ public function getFieldWidgetMap() {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     switch ($data['type']) {
       case 'date':
         $from_format = 'Y-m-d\TH:i:s';
diff --git a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldLegacyTest.php b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..fb51066196c12a55c7f17adec0b03bd04564e93d
--- /dev/null
+++ b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldLegacyTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\datetime\Unit\Plugin\migrate\field;
+
+/**
+ * @group migrate
+ * @group legacy
+ */
+class DateFieldLegacyTest extends DateFieldTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testUnknownDateType($method = 'processFieldValues') {
+    parent::testUnknownDateType($method);
+  }
+
+}
diff --git a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
index 6b7f13727e1638d5e8f674a933065010861f0b34..500eac2307bb4ccfcc6400e6fa8486a83a8f2c3b 100644
--- a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
+++ b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
@@ -11,25 +11,15 @@
  */
 class DateFieldTest extends UnitTestCase {
 
-  /**
-   * @var \Drupal\migrate_drupal\Plugin\MigrateFieldInterface
-   */
-  protected $plugin;
-
-  /**
-   * @var \Drupal\migrate\Plugin\MigrationInterface
-   */
-  protected $migration;
-
   /**
    * Tests an Exception is thrown when the field type is not a known date type.
    */
-  public function testUnknownDateType() {
-    $this->migration = $this->prophesize('Drupal\migrate\Plugin\MigrationInterface')->reveal();
-    $this->plugin = new DateField([], '', []);
+  public function testUnknownDateType($method = 'defineValueProcessPipeline') {
+    $migration = $this->prophesize('Drupal\migrate\Plugin\MigrationInterface')->reveal();
+    $plugin = new DateField([], '', []);
 
     $this->setExpectedException(MigrateException::class, "Field field_date of type 'timestamp' is an unknown date field type.");
-    $this->plugin->processFieldValues($this->migration, 'field_date', ['type' => 'timestamp']);
+    $plugin->$method($migration, 'field_date', ['type' => 'timestamp']);
   }
 
 }
diff --git a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldLegacyTest.php b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..00e6e8c6ea679a906f80f0806fcab023be6b3ab1
--- /dev/null
+++ b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldLegacyTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\datetime\Unit\Plugin\migrate\field\d6;
+
+/**
+ * @group migrate
+ * @group legacy
+ */
+class DateFieldLegacyTest extends DateFieldTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testUnknownDateType($method = 'processFieldValues') {
+    parent::testUnknownDateType($method);
+  }
+
+}
diff --git a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldTest.php b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldTest.php
index c2c50174be137122a90f3fbe8422842a46353d30..cbd26d401b385cdc17949a79c6ad3d49f4b99ecc 100644
--- a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldTest.php
+++ b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldTest.php
@@ -4,6 +4,7 @@
 
 use Drupal\datetime\Plugin\migrate\field\d6\DateField;
 use Drupal\migrate\MigrateException;
+use Drupal\migrate\Plugin\MigrationInterface;
 use Drupal\Tests\UnitTestCase;
 
 /**
@@ -13,26 +14,28 @@
 class DateFieldTest extends UnitTestCase {
 
   /**
-   * @var \Drupal\migrate_drupal\Plugin\MigrateFieldInterface
+   * @var \Drupal\migrate\Plugin\MigrationInterface
    */
-  protected $plugin;
+  protected $migration;
 
   /**
-   * @var \Drupal\migrate\Plugin\MigrationInterface
+   * {@inheritdoc}
    */
-  protected $migration;
+  protected function setUp() {
+    parent::setUp();
+    $this->migration = $this->prophesize(MigrationInterface::class)->reveal();
+  }
 
   /**
    * Tests an Exception is thrown when the field type is not a known date type.
    *
    * @expectedDeprecation DateField is deprecated in Drupal 8.4.x and will be removed before Drupal 9.0.x. Use \Drupal\datetime\Plugin\migrate\field\DateField instead.
    */
-  public function testUnknownDateType() {
-    $this->migration = $this->prophesize('Drupal\migrate\Plugin\MigrationInterface')->reveal();
-    $this->plugin = new DateField([], '', []);
+  public function testUnknownDateType($method = 'defineValueProcessPipeline') {
+    $plugin = new DateField([], '', []);
 
     $this->setExpectedException(MigrateException::class, "Field field_date of type 'timestamp' is an unknown date field type.");
-    $this->plugin->processFieldValues($this->migration, 'field_date', ['type' => 'timestamp']);
+    $plugin->$method($this->migration, 'field_date', ['type' => 'timestamp']);
   }
 
 }
diff --git a/core/modules/field/migrations/d6_field.yml b/core/modules/field/migrations/d6_field.yml
index ab8313ace7c558b04aacfe2514580849da88aaf9..e25d7ae0c236aebf1704d24e541f1caaf19b7547 100644
--- a/core/modules/field/migrations/d6_field.yml
+++ b/core/modules/field/migrations/d6_field.yml
@@ -4,7 +4,7 @@ migration_tags:
   - Drupal 6
   - Configuration
 class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
-field_plugin_method: processField
+field_plugin_method: alterFieldMigration
 source:
   plugin: d6_field
   constants:
diff --git a/core/modules/field/migrations/d6_field_formatter_settings.yml b/core/modules/field/migrations/d6_field_formatter_settings.yml
index 772f36400b0d98cfdda8c507bd3cf217275b9070..23ea2bd0e0e6f442ee4d16358733ed44c9346ec9 100644
--- a/core/modules/field/migrations/d6_field_formatter_settings.yml
+++ b/core/modules/field/migrations/d6_field_formatter_settings.yml
@@ -4,7 +4,7 @@ migration_tags:
   - Drupal 6
   - Configuration
 class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
-field_plugin_method: processFieldFormatter
+field_plugin_method: alterFieldFormatterMigration
 source:
   plugin: d6_field_instance_per_view_mode
   constants:
diff --git a/core/modules/field/migrations/d6_field_instance.yml b/core/modules/field/migrations/d6_field_instance.yml
index 7c2305559001f4722bedd5808a9c1a56443b8d7f..45941165a3d848ddab0c79e8ded3d988851454b2 100644
--- a/core/modules/field/migrations/d6_field_instance.yml
+++ b/core/modules/field/migrations/d6_field_instance.yml
@@ -4,7 +4,7 @@ migration_tags:
   - Drupal 6
   - Configuration
 class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
-field_plugin_method: processFieldInstance
+field_plugin_method: alterFieldInstanceMigration
 source:
   plugin: d6_field_instance
   constants:
diff --git a/core/modules/field/migrations/d6_field_instance_widget_settings.yml b/core/modules/field/migrations/d6_field_instance_widget_settings.yml
index 4c2f4fd8e3fc319de45cc09278f9ae76fb6a86ae..9faac2f36bd2add4b73b182206b308a37fcaec5b 100644
--- a/core/modules/field/migrations/d6_field_instance_widget_settings.yml
+++ b/core/modules/field/migrations/d6_field_instance_widget_settings.yml
@@ -4,7 +4,7 @@ migration_tags:
   - Drupal 6
   - Configuration
 class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
-field_plugin_method: processFieldWidget
+field_plugin_method: alterFieldWidgetMigration
 source:
   plugin: d6_field_instance_per_form_display
   constants:
diff --git a/core/modules/field/migrations/d7_field.yml b/core/modules/field/migrations/d7_field.yml
index aba5c9f917abc2afe15ecd44c61e560ec2b0cc67..96bf5caac23d1fc0948b0de98da5937ce02d8643 100644
--- a/core/modules/field/migrations/d7_field.yml
+++ b/core/modules/field/migrations/d7_field.yml
@@ -4,7 +4,7 @@ migration_tags:
   - Drupal 7
   - Configuration
 class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
-field_plugin_method: processField
+field_plugin_method: alterFieldMigration
 source:
   plugin: d7_field
   constants:
diff --git a/core/modules/field/migrations/d7_field_formatter_settings.yml b/core/modules/field/migrations/d7_field_formatter_settings.yml
index 59783327457081b8c4ef4aa633112e64880166ce..b4580a235603b283f7fc86654549606dfb6cb995 100644
--- a/core/modules/field/migrations/d7_field_formatter_settings.yml
+++ b/core/modules/field/migrations/d7_field_formatter_settings.yml
@@ -4,7 +4,7 @@ migration_tags:
   - Drupal 7
   - Configuration
 class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
-field_plugin_method: processFieldFormatter
+field_plugin_method: alterFieldFormatterMigration
 source:
   plugin: d7_field_instance_per_view_mode
   constants:
diff --git a/core/modules/field/migrations/d7_field_instance.yml b/core/modules/field/migrations/d7_field_instance.yml
index de5f3467f8cc959c67404b80075091f97441aa13..c824c00971e63b7ce38054a12efd82cfa92b6c47 100644
--- a/core/modules/field/migrations/d7_field_instance.yml
+++ b/core/modules/field/migrations/d7_field_instance.yml
@@ -4,7 +4,7 @@ migration_tags:
   - Drupal 7
   - Configuration
 class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
-field_plugin_method: processFieldInstance
+field_plugin_method: alterFieldInstanceMigration
 source:
   plugin: d7_field_instance
   constants:
diff --git a/core/modules/field/migrations/d7_field_instance_widget_settings.yml b/core/modules/field/migrations/d7_field_instance_widget_settings.yml
index 14c1a8c6d52d3cfb4c51c4283eeab59eebc47588..eaa7831d69fa202f9fe22b74c8af785e6de4182d 100644
--- a/core/modules/field/migrations/d7_field_instance_widget_settings.yml
+++ b/core/modules/field/migrations/d7_field_instance_widget_settings.yml
@@ -4,7 +4,7 @@ migration_tags:
   - Drupal 7
   - Configuration
 class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
-field_plugin_method: processFieldWidget
+field_plugin_method: alterFieldWidgetMigration
 source:
   plugin: d7_field_instance_per_form_display
   constants:
diff --git a/core/modules/file/src/Plugin/migrate/field/d6/FileField.php b/core/modules/file/src/Plugin/migrate/field/d6/FileField.php
index 87c3bfe7acb249502dafdd5995f9d963df10d960..d532ccbe2bec687c1acf502c6320d3ed180e2522 100644
--- a/core/modules/file/src/Plugin/migrate/field/d6/FileField.php
+++ b/core/modules/file/src/Plugin/migrate/field/d6/FileField.php
@@ -42,7 +42,7 @@ public function getFieldFormatterMap() {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'd6_field_file',
       'source' => $field_name,
diff --git a/core/modules/file/src/Plugin/migrate/field/d7/FileField.php b/core/modules/file/src/Plugin/migrate/field/d7/FileField.php
index 8157def995ac8379e44bfcb24ef0758cf8b7dabd..8ca9450742d6fd55e25f7d60c22669da0af184c0 100644
--- a/core/modules/file/src/Plugin/migrate/field/d7/FileField.php
+++ b/core/modules/file/src/Plugin/migrate/field/d7/FileField.php
@@ -18,7 +18,7 @@ class FileField extends D6FileField {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'sub_process',
       'source' => $field_name,
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d6/FileCckTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d6/FileCckTest.php
index 0581c27396848fe7e3f78403d070e8e0cab5097a..43d7959ec2ff6f5f9057f0df3ceb28491d66415c 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d6/FileCckTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d6/FileCckTest.php
@@ -33,7 +33,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d7/FileCckTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d7/FileCckTest.php
index 01db93ea9b08e21da8749d7cae15df820564a580..e47a5a93164d9d63ce79fabf4ace9995ebfac0dc 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d7/FileCckTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d7/FileCckTest.php
@@ -33,7 +33,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d7/ImageCckTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d7/ImageCckTest.php
index 2175c64215d3bc64c2d53c9f12dc8265c4d23a69..b20d3d0f41c9775600ce03c2118a1203e0f47e35 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d7/ImageCckTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/cckfield/d7/ImageCckTest.php
@@ -32,7 +32,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldLegacyTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..15cfb630abc406bd8436d1c2d2a032d4742f5366
--- /dev/null
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldLegacyTest.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace Drupal\Tests\file\Unit\Plugin\migrate\field\d6;
+
+/**
+ * @coversDefaultClass \Drupal\file\Plugin\migrate\field\d6\FileField
+ * @group legacy
+ * @group file
+ */
+class FileFieldLegacyTest extends FileFieldTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testDefineValueProcessPipeline($method = 'processFieldValues') {
+    parent::testDefineValueProcessPipeline($method);
+  }
+
+}
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
index 63407c89a33ea87930d0acdd9433ad5faabef630..176657ff2733365d8be9099ece2a216b742bc0af 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
@@ -32,7 +32,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
@@ -44,10 +44,10 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::processFieldValues
+   * @covers ::defineValueProcessPipeline
    */
-  public function testProcessFieldValues() {
-    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+  public function testDefineValueProcessPipeline($method = 'defineValueProcessPipeline') {
+    $this->plugin->$method($this->migration, 'somefieldname', []);
 
     $expected = [
       'plugin' => 'd6_field_file',
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldLegacyTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..72c2fca6a23e4a52c9633c5cfc54a93174372623
--- /dev/null
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldLegacyTest.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace Drupal\Tests\file\Unit\Plugin\migrate\field\d7;
+
+/**
+ * @coversDefaultClass \Drupal\file\Plugin\migrate\field\d7\FileField
+ * @group legacy
+ * @group file
+ */
+class FileFieldLegacyTest extends FileFieldTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testDefineValueProcessPipeline($method = 'processFieldValues') {
+    parent::testDefineValueProcessPipeline($method);
+  }
+
+}
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
index a019647a8fe2dca1fa0722218339dc74ccadd6e8..8e859165706454de23a60d9297a1a22ddc674676 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
@@ -32,7 +32,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
@@ -44,10 +44,10 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::processFieldValues
+   * @covers ::defineValueProcessPipeline
    */
-  public function testProcessFieldValues() {
-    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+  public function testDefineValueProcessPipeline($method = 'defineValueProcessPipeline') {
+    $this->plugin->$method($this->migration, 'somefieldname', []);
 
     $expected = [
       'plugin' => 'sub_process',
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldLegacyTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..65655e630dfbd7a7dadb065510b05551c809f793
--- /dev/null
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldLegacyTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\file\Unit\Plugin\migrate\field\d7;
+
+/**
+ * @group legacy
+ * @group file
+ */
+class ImageFieldLegacyTest extends ImageFieldTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testDefineValueProcessPipeline($method = 'processFieldValues') {
+    parent::testDefineValueProcessPipeline($method);
+  }
+
+}
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
index 9e9c3fa21c4b8aae2a222b937c790de028631ba9..ff9d74c9ba080a9e4ebbbe4d3f9fefec9d770df8 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
@@ -32,7 +32,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
@@ -44,11 +44,11 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::processFieldValues
+   * @covers ::defineValueProcessPipeline
    * @expectedDeprecation ImageField is deprecated in Drupal 8.5.x and will be removed before Drupal 9.0.x. Use \Drupal\image\Plugin\migrate\field\d7\ImageField instead. See https://www.drupal.org/node/2936061.
    */
-  public function testProcessFieldValues() {
-    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+  public function testDefineValueProcessPipeline($method = 'defineValueProcessPipeline') {
+    $this->plugin->$method($this->migration, 'somefieldname', []);
 
     $expected = [
       'plugin' => 'sub_process',
diff --git a/core/modules/image/src/Plugin/migrate/field/d7/ImageField.php b/core/modules/image/src/Plugin/migrate/field/d7/ImageField.php
index 4336c15d3c8cf9b3639815863130342735009405..1d829257182f130f9bca6b56b262154d411e1e4f 100644
--- a/core/modules/image/src/Plugin/migrate/field/d7/ImageField.php
+++ b/core/modules/image/src/Plugin/migrate/field/d7/ImageField.php
@@ -18,7 +18,7 @@ class ImageField extends FieldPluginBase {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'sub_process',
       'source' => $field_name,
diff --git a/core/modules/image/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php b/core/modules/image/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
index 198aa9ddfb7b66d69ee6d7b74dbbc26ea17bb03b..638c4eda73fd4d4b1965d416c10adafc62cb91b4 100644
--- a/core/modules/image/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
+++ b/core/modules/image/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
@@ -10,6 +10,7 @@
 /**
  * @coversDefaultClass \Drupal\image\Plugin\migrate\field\d7\ImageField
  * @group image
+ * @group legacy
  */
 class ImageFieldTest extends UnitTestCase {
 
@@ -44,6 +45,7 @@ protected function setUp() {
 
   /**
    * @covers ::processFieldValues
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
    */
   public function testProcessFieldValues() {
     $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
diff --git a/core/modules/link/src/Plugin/migrate/cckfield/LinkField.php b/core/modules/link/src/Plugin/migrate/cckfield/LinkField.php
index f902987c6784556c9e68f261058a3987c00be056..1a823f550674ae1a415dd2c8669a63ff219d3b27 100644
--- a/core/modules/link/src/Plugin/migrate/cckfield/LinkField.php
+++ b/core/modules/link/src/Plugin/migrate/cckfield/LinkField.php
@@ -29,8 +29,8 @@ class LinkField extends CckFieldPluginBase {
    * {@inheritdoc}
    */
   public function getFieldFormatterMap() {
-    // See d6_field_formatter_settings.yml and CckFieldPluginBase
-    // processFieldFormatter().
+    // See d6_field_formatter_settings.yml and FieldPluginBase
+    // alterFieldFormatterMigration().
     return [
       'default' => 'link',
       'plain' => 'link',
diff --git a/core/modules/link/src/Plugin/migrate/cckfield/d7/LinkField.php b/core/modules/link/src/Plugin/migrate/cckfield/d7/LinkField.php
index c4f09f25e598b03a23a1337ccd1c1b4f219a0684..a796409662f30921f167deaa5977d455c3b3aaaa 100644
--- a/core/modules/link/src/Plugin/migrate/cckfield/d7/LinkField.php
+++ b/core/modules/link/src/Plugin/migrate/cckfield/d7/LinkField.php
@@ -38,9 +38,9 @@ public function getFieldWidgetMap() {
   }
 
   /**
-   * {@inheritdoc}
+   * @inheritdoc}
    */
-  public function processFieldInstance(MigrationInterface $migration) {
+  public function alterFieldInstanceMigration(MigrationInterface $migration) {
     $process = [
       'plugin' => 'static_map',
       'source' => 'settings/title',
diff --git a/core/modules/link/src/Plugin/migrate/field/d6/LinkField.php b/core/modules/link/src/Plugin/migrate/field/d6/LinkField.php
index 547e49201f0f404cbb1b6b29285465970d547d02..7c6fe3b600e50e146a844f587433bf5d6ba0bc35 100644
--- a/core/modules/link/src/Plugin/migrate/field/d6/LinkField.php
+++ b/core/modules/link/src/Plugin/migrate/field/d6/LinkField.php
@@ -23,7 +23,7 @@ class LinkField extends FieldPluginBase {
    */
   public function getFieldFormatterMap() {
     // See d6_field_formatter_settings.yml and FieldPluginBase
-    // processFieldFormatter().
+    // alterFieldFormatterMigration().
     return [
       'default' => 'link',
       'plain' => 'link',
@@ -39,7 +39,7 @@ public function getFieldFormatterMap() {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'field_link',
       'source' => $field_name,
diff --git a/core/modules/link/src/Plugin/migrate/field/d7/LinkField.php b/core/modules/link/src/Plugin/migrate/field/d7/LinkField.php
index c9c7f9f188928eda47704df57363b9107bfa8cf5..20bf629b6538aa33b8d1b282934c65e3bcaa2035 100644
--- a/core/modules/link/src/Plugin/migrate/field/d7/LinkField.php
+++ b/core/modules/link/src/Plugin/migrate/field/d7/LinkField.php
@@ -42,7 +42,7 @@ public function getFieldWidgetMap() {
   /**
    * {@inheritdoc}
    */
-  public function processFieldInstance(MigrationInterface $migration) {
+  public function alterFieldInstanceMigration(MigrationInterface $migration) {
     $process = [
       'plugin' => 'static_map',
       'source' => 'settings/title',
diff --git a/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckDeprecationTest.php b/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckDeprecationTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..97a3892ba8b68947f20fd7c57279a72199b6f024
--- /dev/null
+++ b/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckDeprecationTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\link\Kernel\Plugin\migrate\cckfield\d7;
+
+/**
+ * @group link
+ * @group legacy
+ */
+class LinkCckDeprecationTest extends LinkCckTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use alterFieldInstanceMigration() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testAlterFieldInstanceMigration($method = 'processFieldInstance') {
+    parent::testAlterFieldInstanceMigration($method);
+  }
+
+}
diff --git a/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckTest.php b/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckTest.php
index 14345a60ef28b374aacb70279a7778dd1d80368b..d1e55d10a4b184b226e5aa278441d64de4e65934 100644
--- a/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckTest.php
+++ b/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckTest.php
@@ -39,7 +39,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldInstance() method will call
+    // The plugin's alterFieldInstanceMigration() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
@@ -52,12 +52,10 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::processCckFieldValues
-   * @expectedDeprecation CckFieldPluginBase is deprecated in Drupal 8.3.x and will be be removed before Drupal 9.0.x. Use \Drupal\migrate_drupal\Plugin\migrate\field\FieldPluginBase instead.
-   * @expectedDeprecation MigrateCckFieldInterface is deprecated in Drupal 8.3.x and will be removed before Drupal 9.0.x. Use \Drupal\migrate_drupal\Annotation\MigrateField instead.
+   * @covers ::alterFieldInstanceMigration
    */
-  public function testProcessCckFieldValues() {
-    $this->plugin->processFieldInstance($this->migration);
+  public function testAlterFieldInstanceMigration($method = 'alterFieldInstanceMigration') {
+    $this->plugin->$method($this->migration);
 
     $expected = [
       'plugin' => 'static_map',
diff --git a/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldLegacyTest.php b/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..149442edafb0596e07bb920dddb1dc4d6a7883bf
--- /dev/null
+++ b/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldLegacyTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\link\Kernel\Plugin\migrate\field\d7;
+
+/**
+ * @group legacy
+ * @group link
+ */
+class LinkFieldLegacyTest extends LinkFieldTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use alterFieldInstanceMigration() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testAlterFieldInstanceMigration($method = 'processFieldInstance') {
+    parent::testAlterFieldInstanceMigration($method);
+  }
+
+}
diff --git a/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php b/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php
index 494aa028896f8c47a0ede41e7c2372c741879884..37789dc007fd90fdd05a5ecef1a4400e3483c767 100644
--- a/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php
+++ b/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php
@@ -38,7 +38,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's ProcessFieldInstance() method will call
+    // The plugin's alterFieldInstanceMigration() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
@@ -51,10 +51,10 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::processFieldInstance
+   * @covers ::alterFieldInstanceMigration
    */
-  public function testProcessFieldInstance() {
-    $this->plugin->processFieldInstance($this->migration);
+  public function testAlterFieldInstanceMigration($method = 'alterFieldInstanceMigration') {
+    $this->plugin->$method($this->migration);
 
     $expected = [
       'plugin' => 'static_map',
diff --git a/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldLegacyTest.php b/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..7e7be8e10cac7a93361a788ae5d4e8362e2e8a3e
--- /dev/null
+++ b/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldLegacyTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\link\Unit\Plugin\migrate\field\d6;
+
+/**
+ * @group legacy
+ * @group link
+ */
+class LinkFieldLegacyTest extends LinkFieldTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testDefineValueProcessPipeline($method = 'processFieldValues') {
+    parent::testDefineValueProcessPipeline($method);
+  }
+
+}
diff --git a/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php b/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php
index 0dbc7411310646a2950b9158d1864a41d2c7fa77..a4c86dbabf45cdf5e21f2a7e03381e88cd38e917 100644
--- a/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php
+++ b/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php
@@ -31,7 +31,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // mergeProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to mergeProcessOfProperty().
@@ -44,10 +44,10 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::processFieldValues
+   * @covers ::defineValueProcessPipeline
    */
-  public function testProcessFieldValues() {
-    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+  public function testDefineValueProcessPipeline($method = 'defineValueProcessPipeline') {
+    $this->plugin->$method($this->migration, 'somefieldname', []);
 
     $expected = [
       'plugin' => 'field_link',
diff --git a/core/modules/migrate_drupal/src/Plugin/MigrateFieldInterface.php b/core/modules/migrate_drupal/src/Plugin/MigrateFieldInterface.php
index 2aac5d18eb36a81c0acaa5c095725d722d77b76f..96ed53e5c4155717380314a406fd62d0b98b2d68 100644
--- a/core/modules/migrate_drupal/src/Plugin/MigrateFieldInterface.php
+++ b/core/modules/migrate_drupal/src/Plugin/MigrateFieldInterface.php
@@ -17,7 +17,7 @@ interface MigrateFieldInterface extends PluginInspectionInterface {
    * @param \Drupal\migrate\Plugin\MigrationInterface $migration
    *   The migration entity.
    */
-  public function processField(MigrationInterface $migration);
+  public function alterFieldMigration(MigrationInterface $migration);
 
   /**
    * Apply any custom processing to the field instance migration.
@@ -25,7 +25,7 @@ public function processField(MigrationInterface $migration);
    * @param \Drupal\migrate\Plugin\MigrationInterface $migration
    *   The migration entity.
    */
-  public function processFieldInstance(MigrationInterface $migration);
+  public function alterFieldInstanceMigration(MigrationInterface $migration);
 
   /**
    * Apply any custom processing to the field widget migration.
@@ -33,7 +33,7 @@ public function processFieldInstance(MigrationInterface $migration);
    * @param \Drupal\migrate\Plugin\MigrationInterface $migration
    *   The migration entity.
    */
-  public function processFieldWidget(MigrationInterface $migration);
+  public function alterFieldWidgetMigration(MigrationInterface $migration);
 
   /**
    * Apply any custom processing to the field formatter migration.
@@ -41,7 +41,7 @@ public function processFieldWidget(MigrationInterface $migration);
    * @param \Drupal\migrate\Plugin\MigrationInterface $migration
    *   The migration entity.
    */
-  public function processFieldFormatter(MigrationInterface $migration);
+  public function alterFieldFormatterMigration(MigrationInterface $migration);
 
   /**
    * Get the field formatter type from the source.
@@ -57,7 +57,7 @@ public function getFieldFormatterType(Row $row);
   /**
    * Get a map between D6 formatters and D8 formatters for this field type.
    *
-   * This is used by static::processFieldFormatter() in the base class.
+   * This is used by static::alterFieldFormatterMigration() in the base class.
    *
    * @return array
    *   The keys are D6 formatters and the values are D8 formatters.
@@ -93,7 +93,7 @@ public function getFieldWidgetMap();
    * @param array $data
    *   The array of field data from FieldValues::fieldData().
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data);
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data);
 
   /**
    * Computes the destination type of a migrated field.
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/cckfield/CckFieldPluginBase.php b/core/modules/migrate_drupal/src/Plugin/migrate/cckfield/CckFieldPluginBase.php
index 220c8bbd6c44fb791334fb80a589becb7098cf0f..80ad6fa50763f7db8846572d0217c08c917e0870 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/cckfield/CckFieldPluginBase.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/cckfield/CckFieldPluginBase.php
@@ -21,16 +21,9 @@
 abstract class CckFieldPluginBase extends FieldPluginBase implements MigrateCckFieldInterface {
 
   /**
-   * Apply any custom processing to the field bundle migrations.
-   *
-   * @param \Drupal\migrate\Plugin\MigrationInterface $migration
-   *   The migration entity.
-   * @param string $field_name
-   *   The field name we're processing the value for.
-   * @param array $data
-   *   The array of field data from FieldValues::fieldData().
+   * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     // Provide a bridge to the old method declared on the interface and now an
     // abstract method in this class.
     return $this->processCckFieldValues($migration, $field_name, $data);
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/field/FieldPluginBase.php b/core/modules/migrate_drupal/src/Plugin/migrate/field/FieldPluginBase.php
index dc115abc99f6dd87dd8974e489f95ffa5dbc2b50..78274704d16371b17fb36c0d0d5a31e48a716411 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/field/FieldPluginBase.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/field/FieldPluginBase.php
@@ -20,24 +20,66 @@
 abstract class FieldPluginBase extends PluginBase implements MigrateFieldInterface {
 
   /**
-   * {@inheritdoc}
+   * Alters the migration for field definitions.
+   *
+   * @deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use
+   *   alterFieldMigration() instead.
+   *
+   * @see https://www.drupal.org/node/2944598
+   * @see ::alterFieldMigration()
    */
   public function processField(MigrationInterface $migration) {
+    @trigger_error('Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use alterFieldMigration() instead. See https://www.drupal.org/node/2944598.', E_USER_DEPRECATED);
+    $this->alterFieldMigration($migration);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function alterFieldMigration(MigrationInterface $migration) {
     $process[0]['map'][$this->pluginId][$this->pluginId] = $this->pluginId;
     $migration->mergeProcessOfProperty('type', $process);
   }
 
   /**
-   * {@inheritdoc}
+   * Alert field instance migration.
+   *
+   * @deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use
+   *   alterFieldInstanceMigration() instead.
+   *
+   * @see https://www.drupal.org/node/2944598
+   * @see ::alterFieldInstanceMigration()
    */
   public function processFieldInstance(MigrationInterface $migration) {
-    // Nothing to do by default with field instances.
+    @trigger_error('Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use alterFieldInstanceMigration() instead. See https://www.drupal.org/node/2944598.', E_USER_DEPRECATED);
+    $this->alterFieldInstanceMigration($migration);
   }
 
   /**
    * {@inheritdoc}
    */
+  public function alterFieldInstanceMigration(MigrationInterface $migration) {
+    // Nothing to do by default with field instances.
+  }
+
+  /**
+   * Alter field widget migration.
+   *
+   * @deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use
+   *   alterFieldWidgetMigration() instead.
+   *
+   * @see https://www.drupal.org/node/2944598
+   * @see ::alterFieldWidgetMigration()
+   */
   public function processFieldWidget(MigrationInterface $migration) {
+    @trigger_error('Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use alterFieldWidgetMigration() instead. See https://www.drupal.org/node/2944598.', E_USER_DEPRECATED);
+    $this->alterFieldWidgetMigration($migration);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function alterFieldWidgetMigration(MigrationInterface $migration) {
     $process = [];
     foreach ($this->getFieldWidgetMap() as $source_widget => $destination_widget) {
       $process['type']['map'][$source_widget] = $destination_widget;
@@ -77,11 +119,24 @@ public function getFieldWidgetMap() {
   }
 
   /**
-   * {@inheritdoc}
+   * Alter field formatter migration.
+   *
+   * @deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use
+   *   alterFieldFormatterMigration() instead.
+   *
+   * @see https://www.drupal.org/node/2944598
+   * @see ::processFieldFormatter()
    */
   public function processFieldFormatter(MigrationInterface $migration) {
-    $process = [];
+    @trigger_error('Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use alterFieldFormatterMigration() instead. See https://www.drupal.org/node/2944598.', E_USER_DEPRECATED);
+    $this->alterFieldFormatterMigration($migration);
+  }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function alterFieldFormatterMigration(MigrationInterface $migration) {
+    $process = [];
     // Some migrate field plugin IDs are prefixed with 'd6_' or 'd7_'. Since the
     // plugin ID is used in the static map as the module name, we have to remove
     // this prefix from the plugin ID.
@@ -93,9 +148,23 @@ public function processFieldFormatter(MigrationInterface $migration) {
   }
 
   /**
-   * {@inheritdoc}
+   * Defines the process pipeline for field values.
+   *
+   * @deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use
+   *   defineValueProcessPipeline() instead.
+   *
+   * @see https://www.drupal.org/node/2944598
+   * @see ::defineValueProcessPipeline()
    */
   public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+    @trigger_error('Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.', E_USER_DEPRECATED);
+    return $this->defineValueProcessPipeline($migration, $field_name, $data);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'get',
       'source' => $field_name,
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/field/NodeReference.php b/core/modules/migrate_drupal/src/Plugin/migrate/field/NodeReference.php
index d8b756b916bad879e62a4b5961214d311920e607..de8c4f50950e11257692228aa8ba5a79d550ba51 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/field/NodeReference.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/field/NodeReference.php
@@ -20,7 +20,7 @@ class NodeReference extends FieldPluginBase {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'sub_process',
       'source' => $field_name,
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/field/UserReference.php b/core/modules/migrate_drupal/src/Plugin/migrate/field/UserReference.php
index b42d94cba326cee1a8949ff0f6992a0d8d8827f1..4a60f450de5b02c801cd087daa59fff9de7b8eaf 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/field/UserReference.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/field/UserReference.php
@@ -20,7 +20,7 @@ class UserReference extends FieldPluginBase {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'sub_process',
       'source' => $field_name,
diff --git a/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php b/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
index 536303e95648f962b52678e0c0f7cca7aea3b725..94c759bea45bd99f65a494f3728ea016e71a58be 100644
--- a/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
+++ b/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
@@ -165,7 +165,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
                 $this->fieldPluginCache[$field_type] = $this->fieldPluginManager->createInstance($plugin_id, ['core' => 6], $migration);
               }
               $this->fieldPluginCache[$field_type]
-                ->processFieldValues($migration, $field_name, $info);
+                ->defineValueProcessPipeline($migration, $field_name, $info);
             }
             catch (PluginNotFoundException $ex) {
               try {
diff --git a/core/modules/node/src/Plugin/migrate/D7NodeDeriver.php b/core/modules/node/src/Plugin/migrate/D7NodeDeriver.php
index 28c61b834091e48d263a33d95f0df7cf76f8f355..25099cf178db81fa34887578473c02bbe3473d9a 100644
--- a/core/modules/node/src/Plugin/migrate/D7NodeDeriver.php
+++ b/core/modules/node/src/Plugin/migrate/D7NodeDeriver.php
@@ -168,7 +168,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
                 $this->fieldPluginCache[$field_type] = $this->fieldPluginManager->createInstance($plugin_id, ['core' => 7], $migration);
               }
               $this->fieldPluginCache[$field_type]
-                ->processFieldValues($migration, $field_name, $info);
+                ->defineValueProcessPipeline($migration, $field_name, $info);
             }
             catch (PluginNotFoundException $ex) {
               try {
diff --git a/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php b/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php
index 561a9afe8035e40e25aa06c4b2dbdf0f843a316e..566cf3b3da224614aaf2ec5477ae62076b37119e 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php
@@ -137,7 +137,7 @@ public function getDerivativeDefinitions($base_plugin_definition) {
                 $this->fieldPluginCache[$field_type] = $this->fieldPluginManager->createInstance($plugin_id, ['core' => 7], $migration);
               }
               $this->fieldPluginCache[$field_type]
-                ->processFieldValues($migration, $field_name, $info);
+                ->defineValueProcessPipeline($migration, $field_name, $info);
             }
             catch (PluginNotFoundException $ex) {
               try {
diff --git a/core/modules/taxonomy/src/Plugin/migrate/field/TaxonomyTermReference.php b/core/modules/taxonomy/src/Plugin/migrate/field/TaxonomyTermReference.php
index bea9a3f95f0b259f0dcf71c73a4d526184d9a836..1fa80d2cd59d5404fc7b8ce471f277e8f9d4a5c4 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/field/TaxonomyTermReference.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/field/TaxonomyTermReference.php
@@ -30,7 +30,7 @@ public function getFieldFormatterMap() {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $data) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $data) {
     $process = [
       'plugin' => 'sub_process',
       'source' => $field_name,
diff --git a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckLegacyTest.php b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..003185adbf352d2155d4afc1dff3004433f4869c
--- /dev/null
+++ b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckLegacyTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\taxonomy\Unit\Plugin\migrate\cckfield;
+
+/**
+ * @group taxonomy
+ * @group legacy
+ */
+class TaxonomyTermReferenceCckLegacyTest extends TaxonomyTermReferenceCckTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testDefineValueProcessPipeline($method = 'processFieldValues') {
+    parent::testDefineValueProcessPipeline($method);
+  }
+
+}
diff --git a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckTest.php b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckTest.php
index 437fd67e270a8c02069e859b441567fdf351ca9e..48af5687fec935cca8142ea1a620ae0498fc1d79 100644
--- a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckTest.php
+++ b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckTest.php
@@ -44,11 +44,15 @@ protected function setUp() {
     $this->migration = $migration->reveal();
   }
 
+  public function testProcessCckFieldValues() {
+    $this->testDefineValueProcessPipeline('processCckFieldValues');
+  }
+
   /**
-   * @covers ::processCckFieldValues
+   * @covers ::defineValueProcessPipeline
    */
-  public function testProcessCckFieldValues() {
-    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+  public function testDefineValueProcessPipeline($method = 'defineValueProcessPipeline') {
+    $this->plugin->$method($this->migration, 'somefieldname', []);
 
     $expected = [
       'plugin' => 'sub_process',
diff --git a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldLegacyTest.php b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..60b1cab00c5f63278b140e978acff25b6b3ba1da
--- /dev/null
+++ b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldLegacyTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\taxonomy\Unit\Plugin\migrate\field;
+
+/**
+ * @group taxonomy
+ * @group legacy
+ */
+class TaxonomyTermReferenceFieldLegacyTest extends TaxonomyTermReferenceFieldTest {
+
+  /**
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testDefineValueProcessPipeline($method = 'processFieldValues') {
+    parent::testDefineValueProcessPipeline($method);
+  }
+
+}
diff --git a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldTest.php b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldTest.php
index 8422293c2721bbe24e406411567889a5f362f496..5b7ec3e9c36f7cdaa49a59b59ddfa5738b5b189d 100644
--- a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldTest.php
+++ b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldTest.php
@@ -31,7 +31,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // setProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to setProcessOfProperty().
@@ -44,10 +44,10 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::processFieldValues
+   * @covers ::defineValueProcessPipeline
    */
-  public function testProcessFieldValues() {
-    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+  public function testDefineValueProcessPipeline($method = 'defineValueProcessPipeline') {
+    $this->plugin->$method($this->migration, 'somefieldname', []);
 
     $expected = [
       'plugin' => 'sub_process',
diff --git a/core/modules/text/src/Plugin/migrate/field/d6/TextField.php b/core/modules/text/src/Plugin/migrate/field/d6/TextField.php
index aa324b6f77d1fcae570a12b8a4796a5b42cbbdea..dba6398a06448eeb435ea265ef06db88a250e85a 100644
--- a/core/modules/text/src/Plugin/migrate/field/d6/TextField.php
+++ b/core/modules/text/src/Plugin/migrate/field/d6/TextField.php
@@ -44,7 +44,7 @@ public function getFieldFormatterMap() {
   /**
    * {@inheritdoc}
    */
-  public function processFieldValues(MigrationInterface $migration, $field_name, $field_info) {
+  public function defineValueProcessPipeline(MigrationInterface $migration, $field_name, $field_info) {
     $widget_type = isset($field_info['widget_type']) ? $field_info['widget_type'] : $field_info['widget']['type'];
 
     if ($widget_type == 'optionwidgets_onoff') {
diff --git a/core/modules/text/tests/src/Unit/Migrate/d6/TextFieldTest.php b/core/modules/text/tests/src/Unit/Migrate/d6/TextFieldTest.php
index e17404e0488dbf4f9985b0fa5a78fc73fd5c5f6c..807b9f16e5ec7d9d1231496f8e2a27f45756b7c4 100644
--- a/core/modules/text/tests/src/Unit/Migrate/d6/TextFieldTest.php
+++ b/core/modules/text/tests/src/Unit/Migrate/d6/TextFieldTest.php
@@ -33,7 +33,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // setProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to setProcessOfProperty().
@@ -46,7 +46,11 @@ protected function setUp() {
   }
 
   /**
+   * Calls the deprecated processFieldValues() method to test BC.
+   *
    * @covers ::processFieldValues
+   *
+   * @depends testFilteredTextValueProcessPipeline
    */
   public function testProcessFilteredTextFieldValues() {
     $field_info = [
@@ -69,7 +73,34 @@ public function testProcessFilteredTextFieldValues() {
   }
 
   /**
+   * @covers ::defineValueProcessPipeline
+   */
+  public function testFilteredTextValueProcessPipeline() {
+    $field_info = [
+      'widget_type' => 'text_textfield',
+    ];
+    $this->plugin->defineValueProcessPipeline($this->migration, 'body', $field_info);
+
+    $process = $this->migration->getProcess();
+    $this->assertSame('sub_process', $process['plugin']);
+    $this->assertSame('body', $process['source']);
+    $this->assertSame('value', $process['process']['value']);
+
+    // Ensure that filter format IDs will be looked up in the filter format
+    // migrations.
+    $lookup = $process['process']['format'][2];
+    $this->assertSame('migration', $lookup['plugin']);
+    $this->assertContains('d6_filter_format', $lookup['migration']);
+    $this->assertContains('d7_filter_format', $lookup['migration']);
+    $this->assertSame('format', $lookup['source']);
+  }
+
+  /**
+   * Calls the deprecated processFieldValues() method to test BC.
+   *
    * @covers ::processFieldValues
+   *
+   * @depends testBooleanTextImplicitValueProcessPipeline
    */
   public function testProcessBooleanTextImplicitValues() {
     $info = [
@@ -94,7 +125,36 @@ public function testProcessBooleanTextImplicitValues() {
   }
 
   /**
+   * @covers ::defineValueProcessPipeline
+   */
+  public function testBooleanTextImplicitValueProcessPipeline() {
+    $info = [
+      'widget_type' => 'optionwidgets_onoff',
+      'global_settings' => [
+        'allowed_values' => "foo\nbar",
+      ],
+    ];
+    $this->plugin->defineValueProcessPipeline($this->migration, 'field', $info);
+
+    $expected = [
+      'value' => [
+        'plugin' => 'static_map',
+        'source' => 'value',
+        'default_value' => 0,
+        'map' => [
+          'bar' => 1,
+        ],
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess()['process']);
+  }
+
+  /**
+   * Calls the deprecated processFieldValues() method to test BC.
+   *
    * @covers ::processFieldValues
+   *
+   * @depends testBooleanTextExplicitValueProcessPipeline
    */
   public function testProcessBooleanTextExplicitValues() {
     $info = [
@@ -118,6 +178,31 @@ public function testProcessBooleanTextExplicitValues() {
     $this->assertSame($expected, $this->migration->getProcess()['process']);
   }
 
+  /**
+   * @covers ::defineValueProcessPipeline
+   */
+  public function testBooleanTextExplicitValueProcessPipeline() {
+    $info = [
+      'widget_type' => 'optionwidgets_onoff',
+      'global_settings' => [
+        'allowed_values' => "foo|Foo\nbaz|Baz",
+      ],
+    ];
+    $this->plugin->defineValueProcessPipeline($this->migration, 'field', $info);
+
+    $expected = [
+      'value' => [
+        'plugin' => 'static_map',
+        'source' => 'value',
+        'default_value' => 0,
+        'map' => [
+          'baz' => 1,
+        ],
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess()['process']);
+  }
+
   /**
    * Data provider for testGetFieldType().
    */
diff --git a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldLegacyTest.php b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldLegacyTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..d30844bf0ba6e60dfa907e53dbfa2eed6a8b7642
--- /dev/null
+++ b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldLegacyTest.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Drupal\Tests\text\Unit\Plugin\migrate\field\d6;
+
+/**
+ * @coversDefaultClass \Drupal\text\Plugin\migrate\field\d6\TextField
+ * @group text
+ * @group legacy
+ */
+class TextFieldLegacyTest extends TextFieldTest {
+
+  /**
+   * @covers ::processFieldValues
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testProcessFilteredTextFieldValues($method = 'processFieldValues') {
+    parent::testProcessFilteredTextFieldValues($method);
+  }
+
+  /**
+   * @covers ::processFieldValues
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testProcessBooleanTextImplicitValues($method = 'processFieldValues') {
+    parent::testProcessBooleanTextImplicitValues($method);
+  }
+
+  /**
+   * @covers ::processFieldValues
+   * @expectedDeprecation Deprecated in Drupal 8.6.0, to be removed before Drupal 9.0.0. Use defineValueProcessPipeline() instead. See https://www.drupal.org/node/2944598.
+   */
+  public function testProcessBooleanTextExplicitValues($method = 'processFieldValues') {
+    parent::testProcessBooleanTextExplicitValues($method);
+  }
+
+}
diff --git a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
index 4cc1badc645949e0677cde04e0afe23ed5856e6c..c6970f4d9502c9e4cd9a858e3d25d798fc77fb99 100644
--- a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
+++ b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
@@ -32,7 +32,7 @@ protected function setUp() {
 
     $migration = $this->prophesize(MigrationInterface::class);
 
-    // The plugin's processFieldValues() method will call
+    // The plugin's defineValueProcessPipeline() method will call
     // setProcessOfProperty() and return nothing. So, in order to examine the
     // process pipeline created by the plugin, we need to ensure that
     // getProcess() always returns the last input to setProcessOfProperty().
@@ -45,13 +45,13 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::processFieldValues
+   * @covers ::defineValueProcessPipeline
    */
-  public function testProcessFilteredTextFieldValues() {
+  public function testProcessFilteredTextFieldValues($method = 'defineValueProcessPipeline') {
     $field_info = [
       'widget_type' => 'text_textfield',
     ];
-    $this->plugin->processFieldValues($this->migration, 'body', $field_info);
+    $this->plugin->$method($this->migration, 'body', $field_info);
 
     $process = $this->migration->getProcess();
     $this->assertSame('sub_process', $process['plugin']);
@@ -68,16 +68,16 @@ public function testProcessFilteredTextFieldValues() {
   }
 
   /**
-   * @covers ::processFieldValues
+   * @covers ::defineValueProcessPipeline
    */
-  public function testProcessBooleanTextImplicitValues() {
+  public function testProcessBooleanTextImplicitValues($method = 'defineValueProcessPipeline') {
     $info = [
       'widget_type' => 'optionwidgets_onoff',
       'global_settings' => [
         'allowed_values' => "foo\nbar",
       ],
     ];
-    $this->plugin->processFieldValues($this->migration, 'field', $info);
+    $this->plugin->$method($this->migration, 'field', $info);
 
     $expected = [
       'value' => [
@@ -93,16 +93,16 @@ public function testProcessBooleanTextImplicitValues() {
   }
 
   /**
-   * @covers ::processFieldValues
+   * @covers ::defineValueProcessPipeline
    */
-  public function testProcessBooleanTextExplicitValues() {
+  public function testProcessBooleanTextExplicitValues($method = 'defineValueProcessPipeline') {
     $info = [
       'widget_type' => 'optionwidgets_onoff',
       'global_settings' => [
         'allowed_values' => "foo|Foo\nbaz|Baz",
       ],
     ];
-    $this->plugin->processFieldValues($this->migration, 'field', $info);
+    $this->plugin->$method($this->migration, 'field', $info);
 
     $expected = [
       'value' => [
diff --git a/core/modules/user/src/Plugin/migrate/User.php b/core/modules/user/src/Plugin/migrate/User.php
index 5316259abd3c78ffe98459f2f2d647a615e0a76c..d918932ddcfce9624c6e73cd67960c88aa8f15d6 100644
--- a/core/modules/user/src/Plugin/migrate/User.php
+++ b/core/modules/user/src/Plugin/migrate/User.php
@@ -37,7 +37,7 @@ public function getProcess() {
             }
             $info = $row->getSource();
             $this->fieldPluginCache[$field_type]
-              ->processFieldValues($this, $field_name, $info);
+              ->defineValueProcessPipeline($this, $field_name, $info);
           }
           else {
             if ($this->cckPluginManager->hasDefinition($field_type)) {