Generates a symmetry of the Surface respect global axes.
        
        :param axes: 'x', 'y', 'z', 'xy', 'xz', 'yz'...
        :type axes: str
        :returns: ``pyny.Surface``

def mirror(self, axes='x'):
        """
        Generates a symmetry of the Surface respect global axes.
        
        :param axes: 'x', 'y', 'z', 'xy', 'xz', 'yz'...
        :type axes: str
        :returns: ``pyny.Surface``
        """
        return Space(Place(self)).mirror(axes, inplace=False)[0].surface