docs: func (s *CaptionDescription) Validate() error {
  	invalidParams := request.ErrInvalidParams{Context: "CaptionDescription"}
  	if s.CaptionSelectorName == nil {
  		invalidParams.Add(request.NewErrParamRequired("CaptionSelectorName"))
  	}
  	if s.Name == nil {
  		invalidParams.Add(request.NewErrParamRequired("Name"))
  	}
  	if s.DestinationSettings != nil {
  		if err := s.DestinationSettings.Validate(); err != nil {
  			invalidParams.AddNested("DestinationSettings", err.(request.ErrInvalidParams))
  		}
  	}
  
  	if invalidParams.Len() > 0 {
  		return invalidParams
  	}
  	return nil
  }