33 files declare their use of WebformElementManagerInterface in Webform 8.5

EmailWebformHandler.php in src/Plugin/WebformHandler/EmailWebformHandler.php

OptionsLimitWebformHandler.php in modules/webform_options_limit/src/Plugin/WebformHandler/OptionsLimitWebformHandler.php

RemotePostWebformHandler.php in src/Plugin/WebformHandler/RemotePostWebformHandler.php

webform.tokens.inc in ./webform.tokens.inc

Builds placeholder replacement tokens for webforms and submissions.

WebformAccessGroupForm.php in modules/webform_access/src/WebformAccessGroupForm.php

WebformAdminConfigBaseForm.php in src/Form/AdminConfig/WebformAdminConfigBaseForm.php

WebformAdminConfigElementsForm.php in src/Form/AdminConfig/WebformAdminConfigElementsForm.php

WebformAttachmentController.php in modules/webform_attachment/src/Controller/WebformAttachmentController.php

WebformCardsManager.php in modules/webform_cards/src/WebformCardsManager.php

WebformDevelSchema.php in modules/webform_devel/src/WebformDevelSchema.php

WebformEditorialController.php in modules/webform_editorial/src/Controller/WebformEditorialController.php

WebformEntityConditionsManager.php in src/WebformEntityConditionsManager.php

WebformEntityElementsForm.php in src/WebformEntityElementsForm.php

WebformEntityElementsValidator.php in src/WebformEntityElementsValidator.php

WebformEntityPrintWebformExporter.php in modules/webform_entity_print/src/Plugin/WebformExporter/WebformEntityPrintWebformExporter.php

WebformEntityVariantsForm.php in src/WebformEntityVariantsForm.php

WebformHelpManager.php in src/WebformHelpManager.php

WebformManagedFileBase.php in src/Plugin/WebformElement/WebformManagedFileBase.php

WebformOptionsStorage.php in src/WebformOptionsStorage.php

WebformPluginElementController.php in src/Controller/WebformPluginElementController.php

WebformSignature.php in src/Plugin/WebformElement/WebformSignature.php

WebformSubmissionConditionsValidator.php in src/WebformSubmissionConditionsValidator.php

WebformSubmissionExporter.php in src/WebformSubmissionExporter.php

WebformSubmissionExportImportImporter.php in modules/webform_submission_export_import/src/WebformSubmissionExportImportImporter.php

WebformSubmissionForm.php in src/WebformSubmissionForm.php

WebformSubmissionGenerate.php in src/WebformSubmissionGenerate.php

WebformSubmissionListBuilder.php in src/WebformSubmissionListBuilder.php

WebformSubmissionViewBuilder.php in src/WebformSubmissionViewBuilder.php

WebformTranslationManager.php in src/WebformTranslationManager.php

WebformUiElementDeleteForm.php in modules/webform_ui/src/Form/WebformUiElementDeleteForm.php

WebformUiElementFormBase.php in modules/webform_ui/src/Form/WebformUiElementFormBase.php

WebformUiElementTypeFormBase.php in modules/webform_ui/src/Form/WebformUiElementTypeFormBase.php

WebformUiEntityElementsForm.php in modules/webform_ui/src/WebformUiEntityElementsForm.php