26 files declare their use of FieldItemBase in Drupal 9
- BaseFieldDefinitionTest.php in core/
tests/ Drupal/ Tests/ Core/ Entity/ BaseFieldDefinitionTest.php - BooleanItem.php in core/
lib/ Drupal/ Core/ Field/ Plugin/ Field/ FieldType/ BooleanItem.php - CommentItem.php in core/
modules/ comment/ src/ Plugin/ Field/ FieldType/ CommentItem.php - DateTimeIso8601NormalizerTest.php in core/
modules/ serialization/ tests/ src/ Unit/ Normalizer/ DateTimeIso8601NormalizerTest.php - DateTimeItem.php in core/
modules/ datetime/ src/ Plugin/ Field/ FieldType/ DateTimeItem.php - DummyAjaxItem.php in core/
modules/ image/ tests/ modules/ image_module_test/ src/ Plugin/ Field/ FieldType/ DummyAjaxItem.php - EmailItem.php in core/
lib/ Drupal/ Core/ Field/ Plugin/ Field/ FieldType/ EmailItem.php - EntityReferenceItem.php in core/
lib/ Drupal/ Core/ Field/ Plugin/ Field/ FieldType/ EntityReferenceItem.php - FieldTestItem.php in core/
modules/ system/ tests/ modules/ entity_test/ src/ Plugin/ Field/ FieldType/ FieldTestItem.php - LanguageItem.php in core/
lib/ Drupal/ Core/ Field/ Plugin/ Field/ FieldType/ LanguageItem.php - LayoutSectionItem.php in core/
modules/ layout_builder/ src/ Plugin/ Field/ FieldType/ LayoutSectionItem.php - LinkItem.php in core/
modules/ link/ src/ Plugin/ Field/ FieldType/ LinkItem.php - ListItemBase.php in core/
modules/ options/ src/ Plugin/ Field/ FieldType/ ListItemBase.php - MapItem.php in core/
lib/ Drupal/ Core/ Field/ Plugin/ Field/ FieldType/ MapItem.php - MultiValueTestItem.php in core/
modules/ system/ tests/ modules/ entity_test_update/ src/ Plugin/ Field/ FieldType/ MultiValueTestItem.php - NumericItemBase.php in core/
lib/ Drupal/ Core/ Field/ Plugin/ Field/ FieldType/ NumericItemBase.php - PathItem.php in core/
modules/ path/ src/ Plugin/ Field/ FieldType/ PathItem.php - SerializedItem.php in core/
modules/ system/ tests/ modules/ entity_test/ src/ Plugin/ Field/ FieldType/ SerializedItem.php - SerializedPropertyItem.php in core/
modules/ system/ tests/ modules/ entity_test/ src/ Plugin/ Field/ FieldType/ SerializedPropertyItem.php - ShapeItem.php in core/
modules/ system/ tests/ modules/ entity_test/ src/ Plugin/ Field/ FieldType/ ShapeItem.php - StringItemBase.php in core/
lib/ Drupal/ Core/ Field/ Plugin/ Field/ FieldType/ StringItemBase.php - TelephoneItem.php in core/
modules/ telephone/ src/ Plugin/ Field/ FieldType/ TelephoneItem.php - TestItem.php in core/
modules/ field/ tests/ modules/ field_test/ src/ Plugin/ Field/ FieldType/ TestItem.php - TestObjectItem.php in core/
modules/ field/ tests/ modules/ field_test/ src/ Plugin/ Field/ FieldType/ TestObjectItem.php - TextItemBase.php in core/
modules/ text/ src/ Plugin/ Field/ FieldType/ TextItemBase.php - TimestampItem.php in core/
lib/ Drupal/ Core/ Field/ Plugin/ Field/ FieldType/ TimestampItem.php