Type:

public FormStateDecoratorBase::addCleanValueKey($clea

public FormStateDecoratorBase::hasTemporaryValue($key)

public FormStateInterface::getCacheableArray()

protected FormValidator::doValidateForm(&$elements, FormStateInterface

public FormStateInterface::getSubmitHandlers()

public FormBuilder::setInvalidTokenError(FormStateInterface $form_state)

The form error handler. Type:

The event dispatcher. Type: \Symfony\Component\EventDispatcher\EventDispatcherInterface File

public FormBuilder::renderFormTokenPlaceholder($placeholder)