EntityForm::getBaseFormId

public EntityForm::getBaseFormId()

public function getBaseFormId() {
  // Assign ENTITYTYPE_form as base form ID to invoke corresponding
  // hook_form_alter(), #validate, #submit, and #theme callbacks, but only if
  // it is different from the actual form ID, since callbacks would be invoked
  // twice otherwise.
  $base_form_id = $this->entity->getEntityTypeId() . '_form';
  if ($base_form_id == $this->getFormId()) {
    $base_form_id = NULL;
  }
  return $base_form_id;
}