7 files declare their use of FieldCollectionItem in Field collection 8

FieldCollection.php in src/Plugin/Field/FieldType/FieldCollection.php

FieldCollectionBasicTestCase.php in tests/src/Functional/FieldCollectionBasicTestCase.php

FieldCollectionEmbedWidget.php in src/Plugin/Field/FieldWidget/FieldCollectionEmbedWidget.php

FieldCollectionItemController.php in src/Controller/FieldCollectionItemController.php

FieldCollectionItemHostOperationCheck.php in src/Access/FieldCollectionItemHostOperationCheck.php

FieldCollectionItemHostRevisionsOperationCheck.php in src/Access/FieldCollectionItemHostRevisionsOperationCheck.php

FieldCollectionTestTrait.php in tests/src/Functional/FieldCollectionTestTrait.php