All classes that implement FormSubmitterInterface in Drupal 9
- class \Drupal\Core\Form\FormBuilder implements FormBuilderInterface, FormCacheInterface, FormSubmitterInterface, FormValidatorInterface, TrustedCallbackInterface
- class \Drupal\Core\Form\FormSubmitter implements FormSubmitterInterface
- class \Drupal\bibcite_entity\ReferenceFormBuilder
- class \Drupal\webprofiler\Form\FormBuilderWrapper