public function getInfo( $key = NULL )
	{
		if( !$this->info )
			throw new RuntimeException( "No Request has been sent, yet." );
		if( !$key )
			return $this->info;
		if( !array_key_exists( $key, $this->info ) )
			throw new InvalidArgumentException( 'Status Key "'.$key.'" is invalid.' );
		return $this->info[$key];
	}