Defines the behavior a confirmation form. Hierarchy interface \Drupal\Core\Form\

public static FormStateDecoratorBase::hasAnyErrors()

public FormCache::setCache($form_build_id, $form, FormStateInterface $form_state)

public FormBuilderInterface::processForm($form_id, &$form

Stores information about the state of a form. Hierarchy class \Drupal\Core\Form\

public SubformState::setErrorByName($name, $message = '')

public FormStateDecoratorBase::isSubmitted()

public FormStateDecoratorBase::getButtons()

public FormStateDecoratorBase::setFormObject(FormInterface

public FormState::getBuildInfo() Returns