code: def copy(self, x=None, y=None):
          
          return self.deepcopy(x=x, y=y)
docs: Create a shallow copy of the Keypoint object.
  
          Parameters
          ----------
          x : None or number, optional
              Coordinate of the keypoint on the x axis.
              If ``None``, the instance's value will be copied.
  
          y : None or number, optional
              Coordinate of the keypoint on the y axis.
              If ``None``, the instance's value will be copied.
  
          Returns
          -------
          imgaug.Keypoint
              Shallow copy.