public FormState::setCached($cache = TRUE) Sets

TRUE signifies correct form submission. This is always TRUE for programmed forms coming from

public FormSubmitterInterface::executeSubmitHandlers(&$form

public FormCache::deleteCache($form_build_id) Deletes

public FormStateInterface::hasTemporaryValue($key)

The URL generator. Type:

Base class for implementing system configuration forms. Hierarchy class \Drupal\Core\Form\

protected static FormHelper::processStatesArray(array &$conditions, $search

public FormState::disableRedirect($no_redirect = TRUE)

public FormSubmitter::executeSubmitHandlers(&$form, FormStateInterface