code: func (r *GormWorkItemTypeGroupRepository) CheckExists(ctx context.Context, id uuid.UUID) error {
  	defer goa.MeasureSince([]string{"goa", "db", "workitemtypegroup", "exists"}, time.Now())
  	log.Debug(ctx, map[string]interface{}{"witg_id": id}, "checking if work item type group exists")
  	return repository.CheckExists(ctx, r.db, WorkItemTypeGroup{}.TableName(), id)
  }
docs: // CheckExists returns nil if the given ID exists otherwise returns an error