public FormStateInterface::setAlwaysProcess($always_process =

protected FormCache::loadCachedFormState($form_build_id, FormStateInterface $fo

public FormBase::setRequestStack(RequestStack $request_stack)

public FormBuilder::rebuildForm($form_id, FormStateInterface &$form_state

public FormStateDecoratorBase::getRebuildInfo()

protected FormAjaxSubscriber::getFormAjaxException(\Exception

public &FormStateValuesTrait::getValue($key, $default

public FormStateInterface::isSubmitted()

If TRUE, the form was submitted programmatically, usually invoked via

public static FormStateInterface::hasAnyErrors()