Issue #2166915 by ianthomas_uk, sun | plach: Remove uses of deprecated language functions in tests and procedural code.

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

Issue #2171071 by jessebeach, dawehner, chakrapani, longwave, Gábor Hojtsy, xjm, Wim Leers: Rename drupal_add_library() to _drupal_add_library() and remove its uses.

Issue #2070369 by herom, bdgreen, Mac_Weber, InternetDevels, sidharthap, JeroenT: Remove all calls to deprecated function language().

Issue #2187735 by ianthomas_uk, Sutharsan, andypost: Add removal information to docblock of all @deprecated functions.

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

Issue #1862202 by plach, Berdir, katbailey, ParisLiakos, alexpott, chx, sun, larowlan, Gábor Hojtsy, cosmicdreams, vijaycs85, YesCT, penyaskito, andypost, Albert Volkman, joelpitett: Objectify the language system.

Issue #2102445 follow-up by webwarrior: Remove yet another drupal_set_title in content_translation module.

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

Issue #2086479 by tim.plunkett: Convert content_translation_delete_confirm() to the new form interface.

Issue #1810350 by plach, kfritsche, boran, YesCT: Remove menu_* entity keys and replace them with entity links.

Issue #2045931 by PerthSam152, LinL, adsw12, joelpittet: Replace all module_exists() deprecated function calls.

This reverts commit cc84f390 - bad
commit message.

Issue #2106349 by plach, dawehner, Gábor Hojtsy: Fixed Comment translation overview has broken local tasks.

Issue #1810330 by c4doug, plach, YesCT: Remove EntityTranslationControllerInterface::removeTranslation().

Issue #2080391 by johnmcc, Bladedu, chertzog, jeroen12345: Remove Unused local variables from multiple core files.

Issue #1953408 by swentel, aspilicious, andypost, yched: Remove ArrayAccess BC layer from field config entities.

Issue #2004244 by Berdir, plach, tim.plunkett, msonnabaum, das-peter: Move entity revision, content translation, validation and field methods to ContentEntityInterface.

Issue #2089635 by tim.plunkett, disasm, larowlan: Convert non-test non-form page callbacks to routes and controllers.

Issue #1497374 by yched, chx, amateescu, plach, Damien Tournoud, fago, swentel: Switch from Field-based storage to Entity-based storage.

Issue #1810370 by plach, kfritsche, berdir, alexpott, xjm, chx: Entity Translation API improvements.

Issue #1754246 by webflo, swentel, penyaskito, andypost, alexpott, YesCT, dagmar: Languages should be configuration entities.

Issue #1810320 by alarcombe: Remove EntityTranslationControllerInterface::getAccess() once have entity access.

Issue #2014033 by kgoel, hussainweb: Replace drupal_container() with Drupal::service() in the content_translation() module.

Issue #1982980 by ParisLiakos, larowlan, dawehner, tim.plunkett: Move entity_get_form() to Drupal\Core\Entity\EntityManager::getForm().

Issue #1620010 by dawehner, ParisLiakos, plach, jibran: Move LANGUAGE constants to the Language class.

Issue #1877638 by fago, Gaelan, YesCT, das-peter, tim.plunkett, smiletrl: Rename getOriginalEntity() and remove duplicated functions from ConfigEntityBase.

Issue #1833126 by micnap, mgifford, YesCT, craychee: Add more semantic representation of original language in translations UI.

Issue #1818556 by das-peter, plach, fago, Berdir, vijaycs85: Change notice: Convert nodes to the new Entity Field API.