code: func (q *Query) AppendValues(values Values) {
  	if q.TimeLimit != 0 {
  		values.Set("time", fmt.Sprintf("%d", q.TimeLimit))
  	}
  	if q.Hint.Level != 0 {
  		values.Set("hint.level", fmt.Sprintf("%d", q.Hint.Level))
  	}
  	if q.Hint.Time != 0 {
  		values.Set("hint.time", fmt.Sprintf("%d", q.Hint.Time))
  	}
  	q.Feed.AppendValues(values)
  }
docs: // AppendValues serializes this structure into the provided string key-value store
  // useful to build query strings