public ModelAndView showNewTopicPage(@RequestParam(BRANCH_ID) Long branchId) throws NotFoundException {
Branch branch = branchService.get(branchId);
Topic topic = new Topic();
topic.setBranch(branch);
topic.setPoll(new Poll());
TopicDto dto = new TopicDto(topic);
return new ModelAndView(TOPIC_VIEW)
.addObject(TOPIC_DTO, dto)
.addObject(BRANCH_ID, branchId)
.addObject(SUBMIT_URL, "/topics/new?branchId=" + branchId)
.addObject(BREADCRUMB_LIST, breadcrumbBuilder.getNewTopicBreadcrumb(branch));