28 files declare their use of PanelsDisplayVariant in Panels 8.4

DisplayBuilderBase.php in src/Plugin/DisplayBuilder/DisplayBuilderBase.php

DisplayBuilderInterface.php in src/Plugin/DisplayBuilder/DisplayBuilderInterface.php

InPlaceEditorDisplayBuilder.php in panels_ipe/src/Plugin/DisplayBuilder/InPlaceEditorDisplayBuilder.php

IPEAccessInterface.php in panels_ipe/src/Plugin/IPEAccessInterface.php

IPEAccessManager.php in panels_ipe/src/Plugin/IPEAccessManager.php

IPEAccessManagerInterface.php in panels_ipe/src/Plugin/IPEAccessManagerInterface.php

LayoutChangeSettings.php in src/Form/LayoutChangeSettings.php

PageManagerPanelsStorage.php in src/Plugin/PanelsStorage/PageManagerPanelsStorage.php

panels.api.php in ./panels.api.php

Hooks provided by Panels.

panels.module in ./panels.module

panels.module

PanelsDisplayManager.php in src/PanelsDisplayManager.php

PanelsDisplayManagerInterface.php in src/PanelsDisplayManagerInterface.php

PanelsDisplayVariantTest.php in tests/src/Unit/PanelsDisplayVariantTest.php

PanelsIPEBlockPluginForm.php in panels_ipe/src/Form/PanelsIPEBlockPluginForm.php

PanelsIPELayoutForm.php in panels_ipe/src/Form/PanelsIPELayoutForm.php

PanelsStorageInterface.php in src/Storage/PanelsStorageInterface.php

PanelsStorageManager.php in src/Storage/PanelsStorageManager.php

PanelsStorageManagerInterface.php in src/Storage/PanelsStorageManagerInterface.php

PanelsStorageTest.php in tests/src/Unit/PanelsStorageTest.php

PanelsVariantEvent.php in src/PanelsVariantEvent.php

panels_ipe.api.php in panels_ipe/panels_ipe.api.php

Hooks specific to the Panels IPE module.

RemoveBlockRequestHandler.php in panels_ipe/src/Helpers/RemoveBlockRequestHandler.php

RequestHandlerBase.php in panels_ipe/src/Helpers/RequestHandlerBase.php

RequestHandlerInterface.php in panels_ipe/src/Helpers/RequestHandlerInterface.php

RequestHandlerTestBase.php in panels_ipe/tests/src/Unit/RequestHandlerTestBase.php

StandardDisplayBuilder.php in src/Plugin/DisplayBuilder/StandardDisplayBuilder.php

StandardDisplayBuilderTest.php in tests/src/Unit/StandardDisplayBuilderTest.php

UpdateLayoutRequestHandler.php in panels_ipe/src/Helpers/UpdateLayoutRequestHandler.php