docs: 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