code: func (s *ServiceOp) List(ctx context.Context, input *ListScalersInput) (*ListScalersOutput, error) {
  	r := client.NewRequest(http.MethodGet, "/aws/emr/mrScaler")
  	resp, err := client.RequireOK(s.Client.Do(ctx, r))
  	if err != nil {
  		return nil, err
  	}
  	defer resp.Body.Close()
  
  	gs, err := scalersFromHttpResponse(resp)
  	if err != nil {
  		return nil, err
  	}
  
  	return &ListScalersOutput{Scalers: gs}, nil
  }
docs: //endregion