code: func (c *syncClient) Zadd(arg0 string, arg1 float64, arg2 []byte) (result bool, err Error) {
  	arg0bytes := []byte(arg0)
  	arg1bytes := []byte(fmt.Sprintf("%e", arg1))
  	arg2bytes := arg2
  
  	var resp Response
  	resp, err = c.conn.ServiceRequest(&ZADD, [][]byte{arg0bytes, arg1bytes, arg2bytes})
  	if err == nil {
  		result = resp.GetBooleanValue()
  	}
  	return result, err
  
  }
docs: // Redis ZADD command.