public FormState::getRebuildInfo() Gets

Contains references to details elements to render them within vertical tabs. This property is uncacheable.

public &FormStateInterface::getUserInput()

public FormStateDecoratorBase::setProcessInput($process_input

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

public FormBuilder::doSubmitForm(&$form, FormStateInterface &$form_state)

protected FormErrorHandler::drupalSetMessage($message = NULL, $type

The route match. Type:

public static FormElementHelper::getElementByName($name, array $form)

public &FormStateInterface::getStorage()