Set given keys to their respective values
            @data: #dict or :class:RedisMap of |{key: value}| entries to set

def update(self, data):
        """ Set given keys to their respective values
            @data: #dict or :class:RedisMap of |{key: value}| entries to set
        """
        if not data:
            return
        _rk, _dumps = self.get_key, self._dumps
        data = self._client.mset({
            _rk(key): _dumps(value)
            for key, value in data.items()})