public FormState::cleanValues() Removes

public FormState::setButtons(array $buttons) Stores

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

public FormState::getRebuildInfo() Gets

public FormState::isExecuted() Determines

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

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

If TRUE, the form was submitted and has been processed and executed. This property is uncacheable. Type:

public FormState::disableRedirect($no_redirect = TRUE)

public FormState::setError(array &$element, $message = '')