code: def transform(self, X=None, y=None):
          
          # convert to radians and unpack
          translation_x, translation_y = self.translation
  
          translation_matrix = np.array([[1, 0, translation_x],
                                         [0, 1, translation_y]])
          self.tx.set_parameters(translation_matrix)
          if self.lazy or X is None:
              return self.tx
          else:
              return self.tx.apply_to_image(X, reference=self.reference)
docs: Transform an image using an Affine transform with the given
          translation parameters.  Return the transform if X=None.
  
          Arguments
          ---------
          X : ANTsImage
              Image to transform
  
          y : ANTsImage (optional)
              Another image to transform
  
          Returns
          -------
          ANTsImage if y is None, else a tuple of ANTsImage types
  
          Examples
          --------
          >>> import ants
          >>> img = ants.image_read(ants.get_data('r16'))
          >>> tx = ants.contrib.Translate2D(translation=(10,0))
          >>> img2_x = tx.transform(img)
          >>> tx = ants.contrib.Translate2D(translation=(-10,0)) # other direction
          >>> img2_x = tx.transform(img)
          >>> tx = ants.contrib.Translate2D(translation=(0,10))
          >>> img2_z = tx.transform(img)
          >>> tx = ants.contrib.Translate2D(translation=(10,10))
          >>> img2 = tx.transform(img)