protected static FormState::setAnyErrors($errors = TRUE)

public FormState::clearErrors() Clears all

This is not a special key, and no specific support is provided for it in the Form API. By tradition it was the location where application-specific data was stored for communication

Stores the gathered submission handlers. This property is uncacheable. Type:

An associative array of values submitted to the form. The validation functions and submit functions use this array for nearly all their decision

public FormState::hasTemporaryValue($key) Determines

public FormState::setSubmitHandlers(array $submit_handlers)

public FormState::setCleanValueKeys(array $cleanValueKeys)

public FormState::setButtons(array $buttons) Stores

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