code: def SADWindowSize(self, value):
          
          if value >= 1 and value <= 11 and value % 2:
              self._sad_window_size = value
          else:
              raise InvalidSADWindowSizeError("SADWindowSize must be odd and "
                                              "between 1 and 11.")
          self._replace_bm()
docs: Set private ``_sad_window_size`` and reset ``_block_matcher``.