docs: func (s *DescribeStackResourceDriftsInput) Validate() error {
  	invalidParams := request.ErrInvalidParams{Context: "DescribeStackResourceDriftsInput"}
  	if s.MaxResults != nil && *s.MaxResults < 1 {
  		invalidParams.Add(request.NewErrParamMinValue("MaxResults", 1))
  	}
  	if s.NextToken != nil && len(*s.NextToken) < 1 {
  		invalidParams.Add(request.NewErrParamMinLen("NextToken", 1))
  	}
  	if s.StackName == nil {
  		invalidParams.Add(request.NewErrParamRequired("StackName"))
  	}
  	if s.StackName != nil && len(*s.StackName) < 1 {
  		invalidParams.Add(request.NewErrParamMinLen("StackName", 1))
  	}
  	if s.StackResourceDriftStatusFilters != nil && len(s.StackResourceDriftStatusFilters) < 1 {
  		invalidParams.Add(request.NewErrParamMinLen("StackResourceDriftStatusFilters", 1))
  	}
  
  	if invalidParams.Len() > 0 {
  		return invalidParams
  	}
  	return nil
  }