docs: @RequestMapping(method = RequestMethod.POST, params = "action=chooseSkin")
      public ModelAndView chooseSkin(HttpServletRequest request, @RequestParam String skinName)
              throws IOException {
  
          this.stylesheetUserPreferencesService.setStylesheetParameter(
                  request, PreferencesScope.THEME, "skin", skinName);
  
          return new ModelAndView("jsonView", Collections.emptyMap());
      }