public FormStateInterface::setRedirect($route_name, array $route_parameters

public &FormStateDecoratorBase::getUserInput()

public FormStateInterface::hasTemporaryValue($key)

If set to TRUE the form will skip calling form element value callbacks, except for a select list of callbacks provided by Drupal core that are known to be safe.

public BaseFormIdInterface::getBaseFormId()

public FormCacheInterface::deleteCache($form_build_id)

The request stack. Type: \Symfony\Component\HttpFoundation\RequestStack File

A list containing copies of all submit and button elements in the form. This property is uncacheable. Type:

public FormState::isExecuted() Determines

public FormState::disableCache() Prevents