Similar to self::$build_info, but pertaining to

public FormState::getSubmitHandlers() Gets

public FormStateInterface::getTemporary()

protected FormValidator::finalizeValidation(&$form, FormStateInterface

public FormBuilder::rebuildForm($form_id, FormStateInterface &$form_state

public FormState::isBypassingProgrammedAccessChecks()

public FormStateInterface::setAlwaysProcess($always_process =

public FormAjaxSubscriber::onView(GetResponse

Provides common functionality to confirmation forms. Hierarchy class \Drupal\Core\Form\

Stores information about the state of a subform. In the context of Drupal's Form API, a subform is a form definition array that will be nested