public function __isset($key)
	{
		if (!$this->_isParsed)
		{
			$this->_parseData();
			$this->_isParsed = true;
		}

		return isset($this->_parsedData->$key);
	}
public function __isset($key)
	{
		if (!$this->_isParsed)
		{
			$this->_parseData();
			$this->_isParsed = true;
		}

		return isset($this->_parsedData->$key);
	}
public function __isset ( $ key ) { if ( ! $ this -> _isParsed ) { $ this -> _parseData ( ) ; $ this -> _isParsed = true ; } return isset ( $ this -> _parsedData -> $ key ) ; }
Magic function for isset function on parsed data

@param string $key
@return boolean
Magic function for isset function on parsed data