/**
* Adds one or more messages to the session based message store.
*
* @param mixed $message_args Can be an array or multiple argemuents. Each sub element is a single message string
* @return self (continuation pattern)
*/
public function addMessageInvalid($message_args)
{
$this->saveButtonId = null;
$this->saveLabel = null;
parent::addMessage(func_get_args());
}
