hook_ajax_render_alter(array &$data) Alter the Ajax command data that is sent to the client.

public FormStateInterface::setTriggeringElement($triggering_element)

public FormState::setHasFileElement($has_file_element = TRUE)

public ConfirmFormBase::getFormName() Returns

Provides an interface for a Form that has a base form ID. This will become the $form_state->getBaseInfo()['base_form_id'] used to generate

public FormSubmitter::doSubmitForm(&$form, FormStateInterface &

callback_batch_operation($MULTIPLE_PARAMS, &$context) Perform a single batch operation.

public FormStateDecoratorBase::addCleanValueKey($clea

public FormSubmitter::__construct(RequestStack $request_stack, UrlGeneratorInterface

public FormStateInterface::setSubmitHandlers(array $submit_handlers)