13 files declare their use of ParagraphInterface in Paragraphs 8

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

LibraryItem.php in modules/paragraphs_library/src/Entity/LibraryItem.php

LibraryItemInterface.php in modules/paragraphs_library/src/LibraryItemInterface.php

Paragraph.php in src/Entity/Paragraph.php

ParagraphsLibraryItemHasAllowedParagraphsTypeConstraintValidator.php in modules/paragraphs_library/src/Plugin/Validation/Constraint/ParagraphsLibraryItemHasAllowedParagraphsTypeConstraintValidator.php

ParagraphsNodeMigrationAssertionsTrait.php in tests/src/Traits/ParagraphsNodeMigrationAssertionsTrait.php

ParagraphsSummaryFormatter.php in src/Plugin/Field/FieldFormatter/ParagraphsSummaryFormatter.php

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

paragraphs_test.module in tests/modules/paragraphs_test/paragraphs_test.module

Test module for testing the paragraphs module.

paragraphs_type_permissions.module in modules/paragraphs_type_permissions/paragraphs_type_permissions.module

Contains paragraphs_type_permissions.module

TestBoldTextBehavior.php in tests/modules/paragraphs_test/src/Plugin/paragraphs/Behavior/TestBoldTextBehavior.php

TestDummyBehavior.php in tests/modules/paragraphs_test/src/Plugin/paragraphs/Behavior/TestDummyBehavior.php

TestTextColorBehavior.php in tests/modules/paragraphs_test/src/Plugin/paragraphs/Behavior/TestTextColorBehavior.php