Issue #1966436 by naveenvalecha, cesarmiquel, Berdir, mr.york, jlbellido, segi, vasi1186, Leksat, Gábor Hojtsy, Schnitzel, grisendo, Aron Novak, likin, penyaskito, vijaycs85, kfritsche, fago: Fixed Default *content* entity languages are not set for entities created with the API.

Issue #1976158 by Berdir | msonnabaum: Rename entity storage/list/form/render "controllers" to handlers.

Issue #2283977 by alexpott, Gábor Hojtsy, effulgentsia, fago: Create a new ConfigEntity type for storing bundle-specific customizations of base fields.

Issue #2154435 by andypost, Berdir, mparker17: Rename EntityAccessController to EntityAccessControlHandler.

Issue #597236 by Berdir, catch, msonnabaum, Xano, Wim Leers, jhedstrom, amateescu, corvus_ch, swentel, moshe weitzman, Gábor Hojtsy, riccardoR, killes@www.drop.org, et al: Add entity caching to core.

Issue #2246665 by jaredsmith, martin107, YesCT, filijonka, tstoeckler: Typehint with Drupal\Core\Language\LanguageInterface instead Drupal\Core\Language\Language.

Issue #2241655 by tim.plunkett: EntityStorageInterface::create() should always create a "new" entity.

Issue #2223361 by Berdir, fago, tim.plunkett: Rename ComplexDataInterface::getPropertyValues() to toArray(), remove setPropertyValues().

Issue #2114707 by Berdir, yched, amateescu, effulgentsia, fago: Allow per-bundle overrides of field definitions.

Issue #2002134 by fago, yched, amateescu, effulgentsia: Move TypedData metadata introspection from data objects to definition objects.

Issue #2165155 by Berdir, tim.plunkett: Change $entity_type to $entity_type_id and $entity_info to $entity_type/$entity_types.

Issue #2164827 by Berdir, Xano, tim.plunkett: Rename the entityInfo() and entityType() methods on EntityInterface and EntityStorageControllerInterface.

Issue #2141539 by yched, JStanton, InternetDevels, blesss: Rename FieldItemListInterface::filterEmptyValues() to filterEmptyItems().

Revert "Issue #2141539 by yched, JStanton, InternetDevels, blesss: Rename FieldItemListInterface::filterEmptyValues() to filterEmptyItems()."

Conflicts with a beta blocker; rolling back temporarily.

This reverts commit dc4327ba.

Issue #2141539 by yched, JStanton, InternetDevels, blesss: Rename FieldItemListInterface::filterEmptyValues() to filterEmptyItems().

Issue #2142979 by Gábor Hojtsy, LinL, k4v, plach: Entity label langcode argument is a lie, incompatible with current API.

Issue #2005716 by tim.plunkett, msonnabaum, dawehner, alexpott, effulgentsia: Promote EntityType to a domain object.

Issue #2132145 by plopesc, amateescu, Xano: Rename 'typed_data' / Drupal::typedData() to 'typed_data_manager' / Drupal::typedDataManager.

Issue #2089461 by thedavidmeister, deneo, Alan D., dsdeiz, stpaultim: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in core/lib.

Issue #2076445 by plach, andypost, yched, Gábor Hojtsy: Make sure language codes for original field values always match entity language regardless of field translatability.

Issue #2047229 by fago, smiletrl, Berdir, effulgentsia, amateescu: Make use of classes for entity field and data definitions.

Issue #2129039 by plach, jthorson, pfrenssen, nyirocsaba, Gábor Hojtsy: Integrity constraint violation when translating body field.