code: func (e *WalkGraphReq_Exclude) Normalize() error {
  	if len(e.Quests) > 0 {
  		e.Quests = e.Quests[:set.Uniq(sort.StringSlice(e.Quests))]
  	}
  	return e.Attempts.Normalize()
  }
docs: // Normalize returns an error iff the WalkGraphReq_Exclude is invalid.