public function printNull( $null, $offset = 0, $key = NULL, $sign = NULL, $factor = NULL )
	{
		if( $null === NULL )
		{
			extract( self::$channels[$this->channel] );
			$key = ( $key !== NULL ) ? $key." => " : "";
			$space = $this->indentSign( $offset, $sign, $factor );
			echo $space."[N] ".$key.$booleanOpen."NULL".$booleanClose.$lineBreak;
		}
		else
			$this->printMixed( $null, $offset, $key, $sign, $factor );
	}