10 files declare their use of WebformFormHelper in Webform 8.5

webform.install.update.inc in includes/webform.install.update.inc

Archived Webform update hooks.

webform.module in ./webform.module

Enables the creation of webforms and questionnaires.

WebformComputedBase.php in src/Element/WebformComputedBase.php

WebformDevelEntityFormApiExportForm.php in modules/webform_devel/src/Form/WebformDevelEntityFormApiExportForm.php

WebformDevelEntityFormApiTestForm.php in modules/webform_devel/src/Form/WebformDevelEntityFormApiTestForm.php

WebformElementBase.php in src/Plugin/WebformElementBase.php

WebformFormHelperTest.php in tests/src/Unit/Utility/WebformFormHelperTest.php

WebformHandlerFormBase.php in src/Form/WebformHandlerFormBase.php

WebformTokenManager.php in src/WebformTokenManager.php

WebformVariantFormBase.php in src/Form/WebformVariantFormBase.php