code: def image2source_plane(self, kwargs_source, kwargs_lens, image_plane=False):
          
          kwargs_source_copy = copy.deepcopy(kwargs_source)
          for i, kwargs in enumerate(kwargs_source_copy):
              if self._image_plane_source_list[i] is True and not image_plane:
                  if 'center_x' in kwargs:
                      x_mapped, y_mapped = self._image2SourceMapping.image2source(kwargs['center_x'], kwargs['center_y'],
                                                                                  kwargs_lens, idex_source=i)
                      kwargs['center_x'] = x_mapped
                      kwargs['center_y'] = y_mapped
          return kwargs_source_copy
docs: maps the image plane position definition of the source plane
  
          :param kwargs_source:
          :param kwargs_lens:
          :return: