code: def riak_multi_get(self, key_list_tuple):
          
          pool = PyokoMG()
          objs = self._client.multiget(key_list_tuple, pool=pool)
          pool.stop()
          return objs
docs: Sends given tuples of list to multiget method and took riak objs' keys and data. For each
          multiget call, separate pools are used and after execution, pools are stopped.
          Args:
              key_list_tuple(list of tuples): [('bucket_type','bucket','riak_key')]
  
                                              Example:
                                              [('models','personel','McAPchPZzB6RVJ8QI2XSVQk4mUR')]
  
          Returns:
              objs(tuple): obj's key and obj's value