docs: def move(self, member, destination):
          """ Moves @member from this set to @destination atomically
  
              @member: a member of this set
              @destination: #str redis keyname or :class:RedisSet object
  
              -> #bool True if the member was moved
          """
          destination = self._typesafe(destination)
          return self._client.smove(
              self.key_prefix, destination, self._dumps(member))