code: func (c *WorkItemTypeGroupController) Show(ctx *app.ShowWorkItemTypeGroupContext) error {
  	var typeGroup *workitem.WorkItemTypeGroup
  	var err error
  	err = application.Transactional(c.db, func(appl application.Application) error {
  		typeGroup, err = appl.WorkItemTypeGroups().Load(ctx, ctx.GroupID)
  		if err != nil {
  			return errs.WithStack(err)
  		}
  		return nil
  	})
  	if err != nil {
  		return jsonapi.JSONErrorResponse(ctx, err)
  	}
  	return ctx.OK(&app.WorkItemTypeGroupSingle{
  		Data: ConvertTypeGroup(ctx.Request, *typeGroup),
  	})
  }
docs: // Show runs the list action.