An associative array of information stored by Form API that is necessary to build and rebuild the form from cache when the original context may no longer be available:

public FormState::addBuildInfo($property, $value) Adds

public FormStateInterface::setSubmitHandlers(array $submit_handlers)

public FormStateInterface::isRedirectDisabled()

Wraps AJAX form submissions that are triggered via an exception. Hierarchy class

public FormStateValuesTrait::setValueForElement(array $element

If TRUE, programmatic form submissions are processed without taking #access into account. Set this to FALSE when submitting a form programmatically with values that may have

public FormState::setRedirect($route_name, array $route_parameters = array(), array

public FormStateInterface::getError(array $element)

hook_batch_alter(&$batch) Alter batch information before a batch is processed. Called