public FormStateDecoratorBase::getSubmitHandlers()

public FormStateDecoratorBase::clearErrors()

public FormStateDecoratorBase::setResponse(Response $

public FormStateInterface::isExecuted()

public FormState::loadInclude($module, $type, $name = NULL)

This is not a special key, and no specific support is provided for it in the Form API. By tradition it was the location where application-specific data was stored for communication

public BrokenPostRequestException::

Provides common functionality for form elements. Hierarchy class \Drupal\Core\Form\

Stores the gathered submission handlers. This property is uncacheable. Type:

The module handler. Type: