A wrapper containing a response which is to be enforced upon delivery. The FormBuilder throws an EnforcedResponseException whenever a form desires

protected FormBuilder::buttonWasClicked($element, FormStateInterface &$

public FormState::setButtons(array $buttons) Stores

public FormState::setStorage(array $storage) Sets

Provides validation of form submissions. Hierarchy class \Drupal\Core\Form\

public static ConfigFormBase::create(ContainerInterface $container)

public FormStateInterface::setRebuild($rebuild = TRUE)

A policy rule determining the cacheability of a request. Type:

public FormStateInterface::getRebuildInfo()

public FormState::disableRedirect($no_redirect = TRUE)