Expanded class hierarchy of Checkbox in Drupal 9

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\activity_creator\Plugin\ActivityActionBase implements ActivityActionInterface
- class \Drupal\activity_creator\Plugin\ActivityActionBase implements ActivityActionInterface
- class \Drupal\activity_creator\Plugin\ActivityActionBase implements ActivityActionInterface
- class \Drupal\activity_creator\Plugin\ActivityActionBase implements ActivityActionInterface
- class \Drupal\activity_creator\Plugin\ActivityContextBase implements ActivityContextInterface, ContainerFactoryPluginInterface
- class \Drupal\activity_creator\Plugin\ActivityContextBase implements ActivityContextInterface, ContainerFactoryPluginInterface
- class \Drupal\activity_creator\Plugin\ActivityContextBase implements ActivityContextInterface, ContainerFactoryPluginInterface
- class \Drupal\activity_creator\Plugin\ActivityContextBase implements ActivityContextInterface, ContainerFactoryPluginInterface
- class \Drupal\activity_creator\Plugin\ActivityDestinationBase implements ActivityDestinationInterface
- class \Drupal\activity_creator\Plugin\ActivityDestinationBase implements ActivityDestinationInterface
- class \Drupal\activity_creator\Plugin\ActivityDestinationBase implements ActivityDestinationInterface
- class \Drupal\activity_creator\Plugin\ActivityDestinationBase implements ActivityDestinationInterface
- class \Drupal\activity_creator\Plugin\ActivityEntityConditionBase implements ActivityEntityConditionInterface
- class \Drupal\activity_creator\Plugin\ActivityEntityConditionBase implements ActivityEntityConditionInterface
- class \Drupal\activity_creator\Plugin\ActivityEntityConditionBase implements ActivityEntityConditionInterface
- class \Drupal\activity_creator\Plugin\ActivityEntityConditionBase implements ActivityEntityConditionInterface
- class \Drupal\activity_send\Plugin\ActivitySendBase implements ActivitySendInterface
- class \Drupal\activity_send\Plugin\ActivitySendBase implements ActivitySendInterface
- class \Drupal\activity_send\Plugin\ActivitySendBase implements ActivitySendInterface
- class \Drupal\activity_send\Plugin\ActivitySendBase implements ActivitySendInterface
- class \Drupal\activity_send_email\EmailFrequencyBase implements EmailFrequencyInterface
- class \Drupal\activity_send_email\EmailFrequencyBase implements EmailFrequencyInterface
- class \Drupal\activity_send_email\EmailFrequencyBase implements EmailFrequencyInterface
- class \Drupal\activity_send_email\EmailFrequencyBase implements EmailFrequencyInterface
- class \Drupal\backup_migrate\Drupal\EntityPlugins\WrapperPluginBase implements WrapperPluginInterface
- class \Drupal\bibcite\Plugin\BibCiteProcessorBase implements BibCiteProcessorInterface uses StringTranslationTrait
- class \Drupal\bibcite_entity\Plugin\BibciteLinkPluginBase implements BibciteLinkPluginInterface
- class \Drupal\bootstrap_styles\StylesGroup\StylesGroupPluginBase implements StylesGroupPluginInterface, ContainerFactoryPluginInterface uses StringTranslationTrait
- class \Drupal\bootstrap_styles\Style\StylePluginBase implements StylePluginInterface uses StringTranslationTrait
- class \Drupal\build_hooks\Plugin\FrontendEnvironmentBase implements FrontendEnvironmentInterface, PluginWithFormsInterface uses PluginWithFormsTrait, StringTranslationTrait
- class \Drupal\business_rules\Plugin\BusinessRulesItemPluginBase implements BusinessRulesItemPluginInterface
- class \Drupal\business_rules\Plugin\BusinessRulesReactsOnPlugin implements BusinessRulesReactsOnInterface
- class \Drupal\certificate\Plugin\CertificateMapperBase
- class \Drupal\charts\Plugin\chart\Library\ChartBase implements ChartInterface uses StringTranslationTrait
- class \Drupal\ckeditor_details\Plugin\CKEditorPlugin\DetailPlugin implements CKEditorPluginButtonsInterface, CKEditorPluginInterface
- class \Drupal\clientside_validation\CvValidatorBase implements CvValidatorInterface uses StringTranslationTrait
- class \Drupal\clientside_validation\CvValidatorBase implements CvValidatorInterface uses StringTranslationTrait
- class \Drupal\compiler\Plugin\CompilerPluginBase implements CompilerPluginInterface
- class \Drupal\Component\Plugin\ContextAwarePluginBase implements ContextAwarePluginInterface
- class \Drupal\config_normalizer\Plugin\ConfigNormalizerBase implements ConfigNormalizerInterface
- class \Drupal\content_sync\Plugin\SyncNormalizerDecoratorBase implements SyncNormalizerDecoratorInterface
- class \Drupal\Core\Menu\ContextualLinkDefault implements ContextualLinkInterface
- class \Drupal\Core\Menu\LocalActionDefault implements CacheableDependencyInterface, LocalActionInterface, ContainerFactoryPluginInterface uses DependencySerializationTrait
- class \Drupal\Core\Menu\LocalTaskDefault implements CacheableDependencyInterface, LocalTaskInterface uses DependencySerializationTrait
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\activity_send_push_notification\PushBase implements PushInterface uses StringTranslationTrait
  - class \Drupal\activity_send_push_notification\PushBase implements PushInterface uses StringTranslationTrait
  - class \Drupal\activity_send_push_notification\PushBase implements PushInterface uses StringTranslationTrait
  - class \Drupal\activity_send_push_notification\PushBase implements PushInterface uses StringTranslationTrait
  - class \Drupal\aggregator\Plugin\AggregatorPluginSettingsBase implements ConfigurableInterface, DependentPluginInterface, PluginFormInterface
  - class \Drupal\anonymizer\Anonymizer\AnonymizerBase implements AnonymizerInterface, ContainerFactoryPluginInterface uses \Symfony\Component\DependencyInjection\ContainerAwareTrait
  - class \Drupal\bibcite\Plugin\BibciteFormat implements BibciteFormatInterface
  - class \Drupal\breakpoint\Breakpoint implements BreakpointInterface
  - class \Drupal\business_rules\Plugin\EntityReferenceSelection\BusinessRulesViewsSelection implements SelectionInterface, ContainerFactoryPluginInterface
  - class \Drupal\charts\Plugin\chart\Type\Type implements TypeInterface
  - class \Drupal\ckeditor\CKEditorPluginBase implements CKEditorPluginButtonsInterface, CKEditorPluginInterface
  - class \Drupal\ckeditor_tableselection\Plugin\CKEditorPlugin\CkeditorTableSelection implements CKEditorPluginContextualInterface, CKEditorPluginCssInterface, CKEditorPluginInterface
  - class \Drupal\ckeditor_tableselection\Plugin\CKEditorPlugin\CkeditorTableSelection implements CKEditorPluginContextualInterface, CKEditorPluginCssInterface, CKEditorPluginInterface
  - class \Drupal\cms_content_sync\Plugin\EntityHandlerBase implements EntityHandlerInterface, ContainerFactoryPluginInterface
  - class \Drupal\cms_content_sync\Plugin\EntityHandlerBase implements EntityHandlerInterface, ContainerFactoryPluginInterface
  - class \Drupal\cms_content_sync\Plugin\FieldHandlerBase implements FieldHandlerInterface, ContainerFactoryPluginInterface
  - class \Drupal\cms_content_sync\Plugin\FieldHandlerBase implements FieldHandlerInterface, ContainerFactoryPluginInterface
  - class \Drupal\config_translation\ConfigNamesMapper implements ConfigMapperInterface, ContainerFactoryPluginInterface
  - class \Drupal\content_synchronizer\Processors\Entity\EntityProcessorBase implements EntityProcessorInterface
  - class \Drupal\content_synchronizer\Processors\Type\TypeProcessorBase implements TypeProcessorInterface
  - class \Drupal\Core\Action\ActionBase implements ActionInterface
  - class \Drupal\Core\Block\BlockBase implements BlockPluginInterface, ContextAwarePluginInterface, PluginWithFormsInterface, PreviewFallbackInterface uses BlockPluginTrait, ContextAwarePluginAssignmentTrait, ContextAwarePluginTrait
  - class \Drupal\Core\Block\Plugin\Block\Broken implements BlockPluginInterface, ContainerFactoryPluginInterface uses BlockPluginTrait, CacheableDependencyTrait
  - class \Drupal\Core\Display\VariantBase implements VariantInterface uses RefinableCacheableDependencyTrait, PluginDependencyTrait
  - class \Drupal\Core\Entity\EntityReferenceSelection\SelectionPluginBase implements ConfigurableInterface, DependentPluginInterface, SelectionInterface
  - class \Drupal\Core\Executable\ExecutablePluginBase implements CacheableDependencyInterface, ExecutableInterface, ContextAwarePluginInterface uses ContextAwarePluginTrait
  - class \Drupal\Core\Field\PluginSettingsBase implements DependentPluginInterface, PluginSettingsInterface
  - class \Drupal\Core\Http\LinkRelationType implements LinkRelationTypeInterface
  - class \Drupal\Core\ImageToolkit\ImageToolkitBase implements ImageToolkitInterface
  - class \Drupal\Core\ImageToolkit\ImageToolkitOperationBase implements ImageToolkitOperationInterface
  - class \Drupal\Core\Layout\LayoutDefault implements LayoutInterface, PluginFormInterface uses ContextAwarePluginAssignmentTrait, ContextAwarePluginTrait
  - class \Drupal\Core\Menu\MenuLinkBase implements MenuLinkInterface
  - class \Drupal\Core\Render\Element\RenderElement implements ElementInterface
    class \Drupal\bootstrap_layout_builder\Element\Container
    
    class \Drupal\bootstrap_layout_builder\Element\ContainerWrapper
    
    class \Drupal\bootstrap_styles\Element\VideoBackground
    
    class \Drupal\charts\Element\Chart implements ContainerFactoryPluginInterface uses StringTranslationTrait
    
    class \Drupal\charts\Element\ChartAxisBase
    
    class \Drupal\charts\Element\ChartData
    
    class \Drupal\charts\Element\ChartDataItem
    
    class \Drupal\content_sync\Element\ContentSyncMessage
    
    class \Drupal\contextual\Element\ContextualLinks
    
    class \Drupal\contextual\Element\ContextualLinksPlaceholder
    
    class \Drupal\Core\Render\Element\Ajax
    
    class \Drupal\Core\Render\Element\Container
    
    class \Drupal\Core\Render\Element\Details
    
    class \Drupal\Core\Render\Element\Dropbutton
    
    class \Drupal\Core\Render\Element\Fieldset
    
    class \Drupal\Core\Render\Element\Form
    
    class \Drupal\Core\Render\Element\FormElement implements FormElementInterface
    class \Drupal\autocomplete_deluxe\Element\AutocompleteDeluxeElement uses CompositeFormElementTrait
    
    class \Drupal\bootstrap_datetime_picker\Element\BootstrapDateTime
    
    class \Drupal\charts\Element\BaseSettings
    
    class \Drupal\charts\Element\ChartDataCollectorTable
    
    class \Drupal\compiler_scss\Element\ScssColor
    
    class \Drupal\compiler_scss\Element\ScssFontFamily
    
    class \Drupal\compiler_scss\Element\ScssNumber
    
    class \Drupal\Core\Datetime\Element\DateElementBase
    
    class \Drupal\Core\Render\Element\Button
    
    class \Drupal\Core\Render\Element\Checkbox
    class \Drupal\webform\Element\WebformSame
    
    class \Drupal\webform\Element\WebformTermsOfService
    
    class \Drupal\webform_toggles\Element\WebformToggle
    
    class \Drupal\Core\Render\Element\Checkboxes uses CompositeFormElementTrait
    
    class \Drupal\Core\Render\Element\Color
    
    class \Drupal\Core\Render\Element\Date
    
    class \Drupal\Core\Render\Element\Email
    
    class \Drupal\Core\Render\Element\File
    
    class \Drupal\Core\Render\Element\Hidden
    
    class \Drupal\Core\Render\Element\Item
    
    class \Drupal\Core\Render\Element\LanguageSelect
    
    class \Drupal\Core\Render\Element\Number
    
    class \Drupal\Core\Render\Element\Password
    
    class \Drupal\Core\Render\Element\PasswordConfirm
    
    class \Drupal\Core\Render\Element\Radio
    
    class \Drupal\Core\Render\Element\Radios uses CompositeFormElementTrait
    
    class \Drupal\Core\Render\Element\Search
    
    class \Drupal\Core\Render\Element\Select
    
    class \Drupal\Core\Render\Element\Table
    
    class \Drupal\Core\Render\Element\Tel
    
    class \Drupal\Core\Render\Element\Textarea
    
    class \Drupal\Core\Render\Element\Textfield
    
    class \Drupal\Core\Render\Element\Url
    
    class \Drupal\Core\Render\Element\Value
    
    class \Drupal\Core\Render\Element\Weight
    
    class \Drupal\courier\Element\TemplateCollectionList
    
    class \Drupal\dropdown\Element\Dropdown uses CompositeFormElementTrait
    
    class \Drupal\dropdown\Element\Dropdown uses CompositeFormElementTrait
    
    class \Drupal\dropdown\Element\Dropdown uses CompositeFormElementTrait
    
    class \Drupal\dropdown\Element\Dropdown uses CompositeFormElementTrait
    
    class \Drupal\duration_field\Element\DurationElement uses ProcessStatesTrait
    
    class \Drupal\duration_field\Element\GranularityElement uses ProcessStatesTrait
    
    class \Drupal\field_time\Element\TimeElement
    
    class \Drupal\file\Element\ManagedFile
    
    class \Drupal\fraction\Element\Fraction
    
    class \Drupal\fraction\Element\FractionDecimal
    
    class \Drupal\language\Element\LanguageConfiguration
    
    class \Drupal\loqate\Element\LoqatePcaAddress uses PcaAddressElementTrait
    
    class \Drupal\media_library_form_element\Element\MediaLibrary
    
    class \Drupal\menu_select\Element\MenuSelectTree
    
    class \Drupal\micon\Element\Micon
    
    class \Drupal\mobile_number\Element\MobileNumber
    
    class \Drupal\phone_international\Element\PhoneInternationalElement
    
    class \Drupal\plupload\Element\PlUploadFile
    
    class \Drupal\price\Element\Number
    
    class \Drupal\price\Element\Number
    
    class \Drupal\price\Element\Number
    
    class \Drupal\price\Element\Number
    
    class \Drupal\price\Element\Price
    
    class \Drupal\price\Element\Price
    
    class \Drupal\price\Element\Price
    
    class \Drupal\price\Element\Price
    
    class \Drupal\price\Element\PriceModified
    
    class \Drupal\price\Element\PriceModified
    
    class \Drupal\rng\Element\Registrants
    
    class \Drupal\samlauth\Element\MultiValue
    
    class \Drupal\select_or_other\Element\ElementBase
    
    class \Drupal\signaturefield\Element\Signature
    
    class \Drupal\stripe\Element\StripeBase
    
    class \Drupal\taxonomy_manager\Element\TaxonomyManagerTree
    
    class \Drupal\time_field\Element\TimeElement
    
    class \Drupal\unlimited_number\Element\UnlimitedNumber
    
    class \Drupal\webform\Element\WebformCheckboxValue
    
    class \Drupal\webform\Element\WebformCompositeBase implements WebformCompositeInterface uses WebformCompositeFormElementTrait
    
    class \Drupal\webform\Element\WebformComputedBase implements WebformComputedInterface
    
    class \Drupal\webform\Element\WebformElementAttributes
    
    class \Drupal\webform\Element\WebformElementComposite
    
    class \Drupal\webform\Element\WebformElementMultiple
    
    class \Drupal\webform\Element\WebformElementOptions
    
    class \Drupal\webform\Element\WebformElementStates
    
    class \Drupal\webform\Element\WebformEmailConfirm uses WebformCompositeFormElementTrait
    
    class \Drupal\webform\Element\WebformEmailMultiple
    
    class \Drupal\webform\Element\WebformExcludedBase
    
    class \Drupal\webform\Element\WebformHeight uses WebformCompositeFormElementTrait
    
    class \Drupal\webform\Element\WebformHtmlEditor
    
    class \Drupal\webform\Element\WebformImageResolution uses CompositeFormElementTrait
    
    class \Drupal\webform\Element\WebformLikert
    
    class \Drupal\webform\Element\WebformMapping
    
    class \Drupal\webform\Element\WebformMultiple
    
    class \Drupal\webform\Element\WebformOptions
    
    class \Drupal\webform\Element\WebformOtherBase uses WebformCompositeFormElementTrait
    
    class \Drupal\webform\Element\WebformSignature
    
    class \Drupal\webform\Element\WebformSubmissionViewsReplace
    
    class \Drupal\webform\Element\WebformTime
    
    class \Drupal\webform\Element\WebformVariant
    
    class \Drupal\webform_example_element\Element\WebformExampleElement
    
    class \Drupal\webform_image_select\Element\WebformImageSelectElementImages
    
    class \Drupal\webform_image_select\Element\WebformImageSelectImages
    
    class \Drupal\webform_options_custom\Element\WebformOptionsCustom implements WebformOptionsCustomInterface uses WebformCompositeFormElementTrait
    
    class \Drupal\Core\Render\Element\Html
    
    class \Drupal\Core\Render\Element\HtmlTag
    
    class \Drupal\Core\Render\Element\InlineTemplate
    
    class \Drupal\Core\Render\Element\Label
    
    class \Drupal\Core\Render\Element\Link
    
    class \Drupal\Core\Render\Element\Page
    
    class \Drupal\Core\Render\Element\Pager
    
    class \Drupal\Core\Render\Element\PageTitle
    
    class \Drupal\Core\Render\Element\StatusMessages
    
    class \Drupal\Core\Render\Element\StatusReport
    
    class \Drupal\Core\Render\Element\VerticalTabs
    
    class \Drupal\Core\TempStore\Element\BreakLockLink implements ContainerFactoryPluginInterface
    
    class \Drupal\devel\Element\ClientSideFilterTable
    
    class \Drupal\farm_map\Element\FarmMap
    
    class \Drupal\filter\Element\ProcessedText
    
    class \Drupal\filter\Element\TextFormat
    
    class \Drupal\layout_builder\Element\LayoutBuilder implements ContainerFactoryPluginInterface uses AjaxHelperTrait, LayoutBuilderContextTrait, LayoutBuilderHighlightTrait
    
    class \Drupal\layout_paragraphs\Element\LayoutParagraphsBuilder implements ContainerFactoryPluginInterface uses DialogHelperTrait
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekSourceStatus
    
    class \Drupal\lingotek\Element\LingotekTargetStatus uses LingotekTargetTrait
    
    class \Drupal\lingotek\Element\LingotekTargetStatus
    
    class \Drupal\lingotek\Element\LingotekTargetStatus uses LingotekTargetTrait
    
    class \Drupal\lingotek\Element\LingotekTargetStatus
    
    class \Drupal\lingotek\Element\LingotekTargetStatus
    
    class \Drupal\lingotek\Element\LingotekTargetStatus
    
    class \Drupal\lingotek\Element\LingotekTargetStatus uses LingotekTargetTrait
    
    class \Drupal\lingotek\Element\LingotekTargetStatus
    
    class \Drupal\lingotek\Element\LingotekTargetStatus uses LingotekTargetTrait
    
    class \Drupal\lingotek\Element\LingotekTargetStatus
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses uses LingotekTargetTrait
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses uses LingotekTargetTrait
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses uses LingotekTargetTrait
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses uses LingotekTargetTrait
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses
    
    class \Drupal\lingotek\Element\LingotekTargetStatuses
    
    class \Drupal\render_example\Element\Marquee
    
    class \Drupal\responsive_image\Element\ResponsiveImage
    
    class \Drupal\social_user\Element\AccountHeaderElement
    
    class \Drupal\social_user\Element\AccountHeaderElement
    
    class \Drupal\social_user\Element\AccountHeaderElement
    
    class \Drupal\social_user\Element\AccountHeaderElement
    
    class \Drupal\system\Element\StatusReportPage
    
    class \Drupal\toolbar\Element\Toolbar
    
    class \Drupal\toolbar\Element\ToolbarItem
    
    class \Drupal\views\Element\View
    
    class \Drupal\webform\Element\Webform
    
    class \Drupal\webform\Element\WebformHelp
    
    class \Drupal\webform\Element\WebformHorizontalRule
    
    class \Drupal\webform\Element\WebformMarkup
    
    class \Drupal\webform\Element\WebformMessage
    
    class \Drupal\webform\Element\WebformMore
    
    class \Drupal\webform\Element\WebformSection
    
    class \Drupal\webform\Element\WebformSubmissionInformation
    
    class \Drupal\webform\Element\WebformSubmissionNavigation
    
    class \Drupal\webform\Element\WebformTableRow
    
    class \Drupal\webform_attachment\Element\WebformAttachmentBase implements WebformAttachmentInterface
    
    class \Drupal\webform_cards\Element\WebformCard
    
    class \Drupal\webform_share\Element\WebformShareIframe implements TrustedCallbackInterface
    
    class \Drupal\webform_share\Element\WebformShareScript implements TrustedCallbackInterface
  - class \Drupal\course\Plugin\CourseObjectAccessPluginBase implements PluginFormInterface, CourseObjectAccessInterface
  - class \Drupal\course\Plugin\CourseObjectPluginBase implements CourseObjectInterface
  - class \Drupal\course\Plugin\CourseOutlinePluginBase implements CourseOutlineInterface
  - class \Drupal\data_stream\Plugin\DataStream\DataStreamType\DataStreamTypeBase implements ContainerFactoryPluginInterface, DataStreamTypeInterface
  - class \Drupal\date_recur\Plugin\DateRecurInterpreterPluginBase implements DateRecurInterpreterPluginInterface uses PluginWithFormsTrait
  - class \Drupal\date_recur\Plugin\DateRecurInterpreterPluginBase implements DateRecurInterpreterPluginInterface uses PluginWithFormsTrait
  - class \Drupal\date_recur\Plugin\DateRecurInterpreterPluginBase implements DateRecurInterpreterPluginInterface uses PluginWithFormsTrait
  - class \Drupal\devel\DevelDumperBase implements DevelDumperInterface
  - class \Drupal\devel_generate\DevelGenerateBase implements DevelGenerateBaseInterface
  - class \Drupal\easy_email_override\Plugin\Email\Email implements EmailInterface
  - class \Drupal\editor\Plugin\EditorBase implements EditorPluginInterface
  - class \Drupal\entity_extra_field\ExtraFieldTypePluginBase implements ExtraFieldTypePluginInterface uses PluginDependencyTrait
  - class \Drupal\entity_field_condition\Plugin\EntityFieldCondition\CompareType\EntityFieldCompareTypePluginBase implements EntityFieldCompareTypeInterface
  - class \Drupal\eu_cookie_compliance\Plugin\ConsentStorageBase implements ConsentStorageInterface
  - class \Drupal\farm_entity\FarmEntityTypeBase implements ContainerFactoryPluginInterface
  - class \Drupal\farm_quick\Plugin\QuickForm\QuickFormBase implements ContainerFactoryPluginInterface, QuickFormInterface uses MessengerTrait, StringTranslationTrait
  - class \Drupal\farm_role\ManagedRolePermissions implements ManagedRolePermissionsInterface
  - class \Drupal\fillpdf\Plugin\PdfBackendBase implements PdfBackendInterface
  - class \Drupal\filter\Plugin\FilterBase implements FilterInterface
  - class \Drupal\freelinking\Plugin\FreelinkingPluginBase implements FreelinkingPluginInterface
  - class \Drupal\group\Plugin\Group\Relation\GroupRelationBase implements GroupRelationInterface
  - class \Drupal\help\Plugin\HelpSection\HelpSectionPluginBase implements HelpSectionPluginInterface uses UnchangingCacheableDependencyTrait
  - class \Drupal\help_topics\HelpTopicPluginBase implements HelpTopicPluginInterface
  - class \Drupal\imageapi_optimize\ImageAPIOptimizeProcessorBase implements ContainerFactoryPluginInterface, ImageAPIOptimizeProcessorInterface
  - class \Drupal\image\ImageEffectBase implements ContainerFactoryPluginInterface, ImageEffectInterface
  - class \Drupal\jsonrpc\Plugin\JsonRpcMethodBase implements ContainerFactoryPluginInterface, ExecutableWithParamsInterface
  - class \Drupal\KernelTests\Core\Plugin\Context\TestConfigurableContextAwarePlugin implements ConfigurableInterface, ContextAwarePluginInterface uses ContextAwarePluginTrait
  - class \Drupal\KernelTests\Core\Plugin\Context\TestContextAwarePlugin implements ContextAwarePluginInterface uses ContextAwarePluginTrait
  - class \Drupal\KernelTests\Core\Plugin\TestContextAwarePlugin implements ContextAwarePluginInterface uses ContextAwarePluginTrait
  - class \Drupal\layout_builder\Plugin\SectionStorage\SectionStorageBase implements CacheableDependencyInterface, SectionStorageInterface, TempStoreIdentifierInterface uses ContextAwarePluginTrait, LayoutBuilderRoutesTrait
  - class \Drupal\layout_builder_test\Plugin\SectionStorage\SimpleConfigSectionStorage implements ContainerFactoryPluginInterface, SectionStorageLocalTaskProviderInterface, SectionStorageInterface uses ContextAwarePluginTrait, LayoutBuilderRoutesTrait, SectionListTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroAndTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroBatchFunctionTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroContentTypeTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroEndTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroIfTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroInteractiveTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroManualWebTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroOrTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroSetProcessVariableTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroSpawnSubFlowTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro\Plugin\EngineTasks\MaestroStartTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro_interactive_task_plugin_example\Plugin\EngineTasks\MaestroInteractiveExampleTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro_noninteractive_task_plugin_example\Plugin\EngineTasks\MaestroNonInteractiveExampleTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\maestro_webform\Plugin\EngineTasks\MaestroWebformTask implements MaestroEngineTaskInterface uses MaestroTaskTrait
  - class \Drupal\markdown\Plugin\Markdown\BaseParser implements MarkdownGuidelinesInterface, MarkdownParserInterface
  - class \Drupal\markdown\Plugin\Markdown\Extension\BaseExtension implements MarkdownExtensionInterface uses MarkdownStatesTrait
  - class \Drupal\media\MediaSourceBase implements ContainerFactoryPluginInterface, MediaSourceInterface
  - class \Drupal\media\Plugin\CKEditorPlugin\DrupalMedia implements CKEditorPluginContextualInterface, CKEditorPluginCssInterface, ContainerFactoryPluginInterface
  - class \Drupal\migrate\Plugin\migrate\destination\DestinationBase implements MigrateDestinationInterface, RequirementsInterface
  - class \Drupal\migrate\Plugin\migrate\id_map\NullIdMap implements MigrateIdMapInterface
  - class \Drupal\migrate\Plugin\migrate\id_map\Sql implements ContainerFactoryPluginInterface, HighestIdInterface, MigrateIdMapInterface
  - class \Drupal\migrate\Plugin\migrate\source\SourcePluginBase implements RollbackAwareInterface, MigrateSourceInterface
  - class \Drupal\migrate\Plugin\Migration implements ContainerFactoryPluginInterface, MigrationInterface, RequirementsInterface
  - class \Drupal\migrate\ProcessPluginBase implements MigrateProcessInterface
  - class \Drupal\migrate_drupal\Plugin\migrate\field\FieldPluginBase implements MigrateFieldInterface
  - class \Drupal\openid_connect\Plugin\OpenIDConnectClientBase implements ContainerFactoryPluginInterface, OpenIDConnectClientInterface uses PluginWithFormsTrait, StringTranslationTrait
  - class \Drupal\opigno_group_manager\ContentTypeBase implements ContentTypeInterface
  - class \Drupal\opigno_module\ActivityAnswerPluginBase implements ActivityAnswerPluginInterface
  - class \Drupal\paragraphs_features\Plugin\CKEditorPlugin\SplitText implements CKEditorPluginContextualInterface, CKEditorPluginInterface
  - class \Drupal\pdf_api\Plugin\PdfGeneratorBase implements PdfGeneratorInterface
  - class \Drupal\phpmailer_smtp\Plugin\PhpmailerOauth2\PhpmailerOauth2PluginBase implements PhpmailerOauth2PluginInterface
  - class \Drupal\plugin_test\Plugin\plugin_test\mock_block\MockComplexContextBlock implements ContextAwarePluginInterface uses ContextAwarePluginTrait
  - class \Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserNameBlock implements ContextAwarePluginInterface uses ContextAwarePluginTrait
  - class \Drupal\plugin_test\Plugin\plugin_test\mock_block\TypedDataStringBlock implements ContextAwarePluginInterface uses ContextAwarePluginTrait
  - class \Drupal\printable\Plugin\PrintableFormatBase implements ContainerFactoryPluginInterface, PrintableFormatInterface
  - class \Drupal\quickedit\Plugin\InPlaceEditorBase implements InPlaceEditorInterface
  - class \Drupal\rest\Plugin\ResourceBase implements ContainerFactoryPluginInterface, ResourceInterface
  - class \Drupal\salesforce_mapping\SalesforceMappingFieldPluginBase implements SalesforceMappingFieldPluginInterface
  - class \Drupal\salesforce_push\Plugin\SalesforcePushQueueProcessor\Rest implements PushQueueProcessorInterface
  - class \Drupal\scheduler\SchedulerPluginBase implements SchedulerPluginInterface
  - class \Drupal\search\Plugin\SearchPluginBase implements RefinableCacheableDependencyInterface, ContainerFactoryPluginInterface, SearchInterface uses RefinableCacheableDependencyTrait
  - class \Drupal\search_api_attachments\TextExtractorPluginBase implements ContainerFactoryPluginInterface, TextExtractorPluginInterface
  - class \Drupal\shortcode\Plugin\ShortcodeBase implements ShortcodeInterface
  - class \Drupal\simplenews\Plugin\simplenews\RecipientHandler\RecipientHandlerBase implements RecipientHandlerInterface
  - class \Drupal\simple_sitemap\Plugin\simple_sitemap\SimpleSitemapPluginBase implements SimpleSitemapPluginInterface
  - class \Drupal\sms\Plugin\SmsGatewayPluginBase implements SmsGatewayPluginInterface
  - class \Drupal\sms\Plugin\SmsGatewayPluginBase implements SmsGatewayPluginInterface
  - class \Drupal\social_api\Plugin\NetworkBase implements NetworkInterface
  - class \Drupal\social_demo\DemoContent implements DemoContentInterface
  - class \Drupal\social_demo\DemoContent implements DemoContentInterface
  - class \Drupal\social_demo\DemoContent implements DemoContentInterface
  - class \Drupal\social_demo\DemoContent implements DemoContentInterface
  - class \Drupal\styleguide\Plugin\StyleguidePluginBase implements ContainerFactoryPluginInterface, StyleguideInterface
  - class \Drupal\tour\TipPluginBase implements TipPluginInterface
  - class \Drupal\twig_extender\Plugin\Twig\TwigPluginBase implements TwigExtensionInterface
  - class \Drupal\views\Plugin\views\join\JoinPluginBase implements JoinPluginInterface
  - class \Drupal\views\Plugin\views\PluginBase implements DependentPluginInterface, ContainerFactoryPluginInterface, TrustedCallbackInterface, ViewsPluginInterface
  - class \Drupal\views_add_button\Plugin\views_add_button\ViewsAddButtonDefault implements ViewsAddButtonInterface
  - class \Drupal\views_add_button\Plugin\views_add_button\ViewsAddButtonNode implements ViewsAddButtonInterface
  - class \Drupal\views_add_button\Plugin\views_add_button\ViewsAddButtonTaxonomy implements ViewsAddButtonInterface
  - class \Drupal\views_add_button\Plugin\views_add_button\ViewsAddButtonUser implements ViewsAddButtonInterface
  - class \Drupal\warmer\Plugin\WarmerPluginBase implements ConfigurableInterface, DependentPluginInterface, ContainerFactoryPluginInterface, PluginFormInterface, WarmerInterface
  - class \Drupal\webform\Plugin\WebformExporterBase implements WebformExporterInterface uses WebformEntityStorageTrait
  - class \Drupal\webform\Plugin\WebformHandlerBase implements WebformHandlerInterface uses WebformEntityStorageTrait, WebformEntityInjectionTrait, WebformPluginSettingsTrait
  - class \Drupal\webform\Plugin\WebformSourceEntityBase implements ContainerFactoryPluginInterface, WebformSourceEntityInterface
  - class \Drupal\webform\Plugin\WebformVariantBase implements WebformVariantInterface uses WebformEntityInjectionTrait, WebformPluginSettingsTrait
  - class \Drupal\workbench_email\Plugin\RecipientTypeBase implements RecipientTypeInterface uses PluginWithFormsTrait
  - class \Drupal\wysiwyg_template\Plugin\CKEditorPlugin\Templates implements CKEditorPluginInterface, ContainerFactoryPluginInterface
  - class \Drupal\xbbcode\Plugin\TagPluginBase implements TagPluginInterface
- class \Drupal\Core\Queue\QueueWorkerBase implements QueueWorkerInterface
- class \Drupal\dashboards\Plugin\DashboardBase implements ContainerFactoryPluginInterface, DashboardInterface uses StringTranslationTrait
- class \Drupal\editor\Plugin\InPlaceEditor\Editor implements InPlaceEditorInterface
- class \Drupal\entity_legal\EntityLegalPluginBase implements EntityLegalPluginInterface
- class \Drupal\entity_legal\EntityLegalPluginBase implements EntityLegalPluginInterface
- class \Drupal\entity_test\Plugin\Validation\Constraint\EntityTestDefaultPlugin
- class \Drupal\field_inheritance\Plugin\FieldInheritance\FieldInheritancePluginBase implements ContainerFactoryPluginInterface, FieldInheritancePluginInterface
- class \Drupal\fillpdf\Plugin\FillPdfActionPluginBase implements FillPdfActionPluginInterface
- class \Drupal\fullcalendar_view\Plugin\FullcalendarViewProcessorBase implements FullcalendarViewProcessorInterface
- class \Drupal\fullcalendar_view\Plugin\FullcalendarViewProcessorBase implements FullcalendarViewProcessorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\EditorDetectorBase implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\EditorDetectorBase implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\EditorDetectorBase implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\EditorDetectorBase implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\EntityReferenceDetectorBase implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\EntityReferenceDetectorBase implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\EntityReferenceDetectorBase implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\EntityReferenceDetectorBase implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\FieldLinkDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\FieldLinkDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\FieldLinkDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\FieldLinkDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\NestedEntityReferencesDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\NestedLayoutBuilderEntitiesDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\NestedLayoutBuilderEntitiesDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\NestedLayoutBuilderEntitiesDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\lingotek\Plugin\RelatedEntitiesDetector\NestedLayoutBuilderEntitiesDetector implements ContainerFactoryPluginInterface, RelatedEntitiesDetectorInterface
- class \Drupal\opigno_learning_path\LearningPathMembersPluginBase implements LearningPathMembersPluginInterface
- class \Drupal\plugin_test\Plugin\plugin_test\mock_block\MockLayoutBlock
- class \Drupal\plugin_test\Plugin\plugin_test\mock_block\MockTestBlock
- class \Drupal\plugin_test\Plugin\plugin_test\mock_block\MockUserLoginBlock
- class \Drupal\plugin_type_example\SandwichBase implements SandwichInterface
- class \Drupal\quiz\Plugin\QuizQuestionPluginBase implements QuizQuestionInterface
- class \Drupal\rabbit_hole\Plugin\RabbitHoleBehaviorPluginBase implements RabbitHoleBehaviorPluginInterface
- class \Drupal\rabbit_hole\Plugin\RabbitHoleEntityPluginBase implements RabbitHoleEntityPluginInterface
- class \Drupal\simple_oauth\Plugin\Oauth2GrantBase implements Oauth2GrantInterface
- class \Drupal\sitemap\SitemapBase implements SitemapInterface uses StringTranslationTrait
- class \Drupal\social_content_block\ContentBlockBase implements ContentBlockPluginInterface
- class \Drupal\social_content_block\ContentBlockBase implements ContentBlockPluginInterface
- class \Drupal\social_content_block\ContentBlockBase implements ContentBlockPluginInterface
- class \Drupal\social_content_block\ContentBlockBase implements ContentBlockPluginInterface
- class \Drupal\social_event_addtocal\Plugin\SocialAddToCalendarBase implements SocialAddToCalendarInterface
- class \Drupal\social_event_addtocal\Plugin\SocialAddToCalendarBase implements SocialAddToCalendarInterface
- class \Drupal\social_event_addtocal\Plugin\SocialAddToCalendarBase implements SocialAddToCalendarInterface
- class \Drupal\social_event_addtocal\Plugin\SocialAddToCalendarBase implements SocialAddToCalendarInterface
- class \Drupal\social_lets_connect_usage\Plugin\ShareUsageDataPluginBase implements ContainerFactoryPluginInterface, ShareUsageDataPluginInterface uses StringTranslationTrait
- class \Drupal\social_lets_connect_usage\Plugin\ShareUsageDataPluginBase implements ContainerFactoryPluginInterface, ShareUsageDataPluginInterface uses StringTranslationTrait
- class \Drupal\social_lets_connect_usage\Plugin\ShareUsageDataPluginBase implements ContainerFactoryPluginInterface, ShareUsageDataPluginInterface uses StringTranslationTrait
- class \Drupal\social_lets_connect_usage\Plugin\ShareUsageDataPluginBase implements ContainerFactoryPluginInterface, ShareUsageDataPluginInterface uses StringTranslationTrait
- class \Drupal\social_user_export\Plugin\UserExportPluginBase implements ContainerFactoryPluginInterface, UserExportPluginInterface uses StringTranslationTrait
- class \Drupal\social_user_export\Plugin\UserExportPluginBase implements ContainerFactoryPluginInterface, UserExportPluginInterface uses StringTranslationTrait
- class \Drupal\social_user_export\Plugin\UserExportPluginBase implements ContainerFactoryPluginInterface, UserExportPluginInterface uses StringTranslationTrait
- class \Drupal\social_user_export\Plugin\UserExportPluginBase implements ContainerFactoryPluginInterface, UserExportPluginInterface uses StringTranslationTrait
- class \Drupal\synonyms\Plugin\Synonyms\Provider\AbstractProvider implements ContainerFactoryPluginInterface, ConfigurationInterface, FindInterface, FormatWordingInterface, GetInterface, ProviderInterface uses ConfigurationTrait
- class \Drupal\tca\Plugin\TcaPluginBase implements TcaPluginInterface
- class \Drupal\Tests\Core\Plugin\ConfigurablePlugin implements ConfigurableInterface
- class \Drupal\Tests\Core\Plugin\Fixtures\TestConfigurablePlugin implements ConfigurableInterface, DependentPluginInterface
- class \Drupal\Tests\Core\Plugin\TestClass implements PluginFormInterface, PluginWithFormsInterface uses PluginWithFormsTrait
- class \Drupal\usermerge\Plugin\UserMerge\Action\UserMergeActionBase implements UserMergeActionPluginInterface
- class \Drupal\usermerge\Plugin\UserMerge\Property\UserMergePropertyBase implements UserMergePropertyPluginInterface
- class \Drupal\webform\Plugin\WebformElementBase implements TrustedCallbackInterface, WebformElementInterface uses MessengerTrait, StringTranslationTrait, WebformCompositeFormElementTrait, WebformEntityStorageTrait, WebformEntityInjectionTrait
- class \Drupal\webform_content_creator\Plugin\FieldMappingBase implements FieldMappingInterface
- class \Drupal\workflows\Plugin\WorkflowTypeBase implements WorkflowTypeInterface uses PluginWithFormsTrait
- class \Drupal\wsdata\Plugin\WSConnectorBase implements WSConnectorInterface uses StringTranslationTrait
- class \Drupal\wsdata\Plugin\WSDecoderBase implements WSDecoderInterface
- class \Drupal\wsdata\Plugin\WSEncoderBase implements WSEncoderInterface

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Expanded class hierarchy of Checkbox in Drupal 9

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