Issue #2346373 by fago, sidharrell, rteijeiro, arlinsandbulte: Data reference validation constraints are applied wrong

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2454441 by rteijeiro, hussainweb, 17thColossus, nullkernel: Rename Typed Data classes to support PHP 7

Issue #2164601 by yched, jibran, amateescu, pfrenssen: Stop auto-creating FieldItems on mere reading of $entity->field[N]

Issue #2363099 by Gábor Hojtsy, Berdir, swentel, plach: Using translated field definition descriptions in entity schema results in different schema definitions, resulting in update.php changes

Issue #2197029 by dawehner, larowlan, ParisLiakos: Allow to inject dependencies into validation constraints

Issue #2225427 by ianthomas_uk, martin107, JeroenT, LoMo: Remove remaining uses of deprecated language functions (mostly in object oriented code)

Issue #2232477 by plach, yched, tstoeckler, amateescu: Fatal when adding new fields with NOT NULL constraints in a base table that contains existing entities

Issue #2365585 by yched: FieldItemList::filterEmptyItems() renumbers deltas but does not update the Items

Issue #2221577 by andypost, alexpott, yched: Fix assumption that field settings is not a nested array.

Issue #2359449 by Jose Reyero: Fixed TypedData calls onChange() parent's method that is not part of the interface.

Issue #2341341 by YesCT, martin107, vijaycs85, fran seva: Change public 'name' property access on languages to getName() and add back setName().

Issue #2346129 by tstoeckler: Introduce a TraversableTypedDataInterface and use that for typehinting instead of ArrayElement.

Issue #2340667 by YesCT, Pedro Lozano, alexpott, martin107: Protect Drupal\Core\Language\Language::id, and use getId().

Issue #2002138 by yched, Jose Reyero, xjm, andypost, fago, msonnabaum, Berdir, dixon_: Use adapters for supporting typed data.

Issue #2332885 by cs_shadow, Berdir, fago: Rename AllowedValuesInterface to OptionsProviderInterface.

Issue #2318281 by tim.plunkett, dawehner | kim.pepper: Provide a standard way to check a plugin is an instance of the required interface.

Issue #2212427 by Mixologic, YesCT, Sutharsan, mgriego, icseh., visabhishek, znerol: Use interface instead of class name for language manager where appropriate.

Issue #2297631 by martin107: Nudge contrib into overriding \Drupal\Core\TypedData\TypedData::setValue() consistently.

Issue #2281635 by fubhy, er.pushpinderrana, EclipseGc, blueminds, tim.plunkett: \Drupal\Core\Plugin\Context\Context should use a ContextDefinition class instead of arrays.

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