docs: func (s *DescribeSnapshotScheduleInput) Validate() error {
  	invalidParams := request.ErrInvalidParams{Context: "DescribeSnapshotScheduleInput"}
  	if s.VolumeARN == nil {
  		invalidParams.Add(request.NewErrParamRequired("VolumeARN"))
  	}
  	if s.VolumeARN != nil && len(*s.VolumeARN) < 50 {
  		invalidParams.Add(request.NewErrParamMinLen("VolumeARN", 50))
  	}
  
  	if invalidParams.Len() > 0 {
  		return invalidParams
  	}
  	return nil
  }