Message::setId() 

\nn\t3::Message()->setId($name = NULL); 

Determines which MessageQueue is to be used

\nn\t3::Message()->setId('top')->OK('Title', 'Infotext');

Output in Fluid via ViewHelper:

{nnt3:flashMessages(id:'above')}

| @return void

public function setId( $name = null ) {
	$this->queueId = $name;
	return $this;
}