public FormState::setBuildInfo(array $build_info) Sets

An associative array of form value keys to be removed by cleanValues(). Any values that are temporary but must still be displayed as values

public &FormState::getCompleteForm() Returns

If set to TRUE the form will NOT perform a redirect, even if self::$redirect is set. This property is uncacheable.

public FormState::cleanValues() Removes

Holds temporary data accessible during the current page request only. All $form_state properties that are not reserved keys (see other properties

public &FormState::getGroups() Returns

Normally, after the entire form processing is completed and submit handlers have run, a form is considered to be done and

public FormState::isValidationComplete() Determines

The array of values as they were submitted by the user. These are raw and unvalidated, so should not be used without a thorough understanding