code: protected Map<String, String> getInfoMap() {
  
          Map<String, String> infos = new LinkedHashMap<String, String>();
          List<CmsSessionInfo> sessions = OpenCms.getSessionManager().getSessionInfos();
          List<CmsUUID> user = new ArrayList<CmsUUID>();
          for (CmsSessionInfo info : sessions) {
              CmsUUID id = info.getUserId();
              if (!user.contains(id)) {
                  user.add(id);
              }
          }
          infos.put(
              CmsVaadinUtils.getMessageText(Messages.GUI_MESSAGES_SESSION_COUNT_0),
              String.valueOf(sessions.size()));
          infos.put(CmsVaadinUtils.getMessageText(Messages.GUI_MESSAGES_USER_COUNT_0), String.valueOf(user.size()));
          return infos;
      }
docs: Get a map with infos for info button.<p>
  
  @return map