Issue #2785521: Fixed error after upgrading from 8.x-1.x-dev. The "" entity type does not exist.
Issue #2787613: Fixed "This value should not be null" message.
Issue #2509254 by jmuzz, jibran: Field collection fields should extend entity reference fields
Issue #2385985 by wizonesolutions, gmercer, hussainweb, sherakama: Deleting host entity causes save during deletion
Issue #2784333 by jmuzz: Fixes for Drupal Core REST updates
Issue #1289062 by AohRveTPV: Fixed undefined variable error.
Issue #2776731 by FiNeX, panche: Removed extra comma in composer.json which breaks "composer drupal-update"
Issue #2628388: Replaced 8.x-2.x branch with an informative README.
Issue #2762175: Added a composer.json
Issue #2764977: Convert all field collection Simpletest web tests to BrowserTestBase (or UnitTestBase/KernelTestBase)
Issue #2416237 by Ashley George, jrb: Deleting field collection items from node, then adding more creates multiple revisions of same field collection entity on save
Issue #1788222 by Chris Burge, czigor, Nick Bell, DaneMacaulay, logaritmisk, mvlabat, jmuzz: Allow "add another" button instead of empty field collection item form when using the embedded widget
Issue #2768809 by jmuzz: Fixed some problems with long field names and data storage compatibility.
Issue #2768877 by steveoliver: Fixed warning on field collection help page.
Issue #2628648 by jmuzz: Allow access to subfields from twig
Issue #2769205 by jmuzz: Switched to short array syntax
Issue #2766861 by neerajskydiver: Removed some depreciated methods and unused imports
Issue #2768161 by id.tarzanych: Remove unnecessary override of createDuplicate().
Issue #2762727 by damiankloip: Fixed FieldCollectionItem::getHostId().
Issue #2762465 by jmuzz: Code cleanup
Issue #2760393 by jmuzz: Removed unnecessary @file tags.
Issue #2761297 by audriusb: Fixed bad sql queries.
Issue #2761987 by miiimooo: Fixed an error that occurs when updating a migrated field collection item with another migration run.
Issue #2614292 by jmuzz: Tests for REST/Serialized Output (JSON) of Field Collection Items
Issue #2614292 by charginghawk: Added REST/Serialized Output (JSON) of Field Collection Items
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