code: func (c *asyncClient) Randomkey() (result FutureString, err Error) {
  	var resp *PendingResponse
  	resp, err = c.conn.QueueRequest(&RANDOMKEY, [][]byte{})
  	if err == nil {
  		result = resp.future.(FutureString) // REVU - this is broken
  	}
  	return result, err
  
  }
docs: // Redis RANDOMKEY command.