docs: def overflow(self, overflow):
          """
          Update the overflow algorithm of successive INCRBY operations
          :param overflow: Overflow algorithm, one of WRAP, SAT, FAIL. See the
              Redis docs for descriptions of these algorithmsself.
          :returns: a :py:class:`BitFieldOperation` instance.
          """
          overflow = overflow.upper()
          if overflow != self._last_overflow:
              self._last_overflow = overflow
              self.operations.append(('OVERFLOW', overflow))
          return self