code: func (i *Parameters_Job_Inputs) Normalize() (err error) {
  	if i.Cipd == nil && len(i.Isolated) == 0 {
  		return errors.New(
  			"job.inputs: at least one of packages and isolated must be specified")
  	}
  	if i.Cipd != nil {
  		if err = i.Cipd.Normalize(); err != nil {
  			return
  		}
  	}
  	return
  }
docs: // Normalize normalizes and checks for input violations.