All classes that implement FormBuilderInterface in Drupal 8
- class \Drupal\Core\Form\FormBuilder implements FormBuilderInterface, FormCacheInterface, FormSubmitterInterface, FormValidatorInterface, TrustedCallbackInterface
- class \Drupal\autosave_form\Form\AutosaveFormBuilder uses AutosaveButtonClickedTrait
- class \Drupal\bibcite_entity\ReferenceFormBuilder
- class \Drupal\securepages\FormBuilder
- class \Drupal\webprofiler\Form\FormBuilderWrapper
- class \Drupal\webprofiler\Form\FormBuilderWrapper
- class \Drupal\webprofiler\Form\FormBuilderWrapper