public function getOption( $key)
	{
		if( $this->_parsed )
		{
			if( NULL !== $this->headers->getOption( $key ) )
				return $this->headers->getOption( $key );
			return false;
		}
		else
			trigger_error( "OPML_DOM_Parser[getOption]: OPML Document has not been parsed yet.", E_USER_WARNING );
	}