code: private JSONObject readUserFolderFilters() {
  
          CmsUser user = getCmsObject().getRequestContext().getCurrentUser();
          String addInfo = (String)user.getAdditionalInfo(FOLDER_FILTER_ADD_INFO_KEY);
          JSONObject result = null;
          if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(addInfo)) {
              try {
                  result = new JSONObject(addInfo);
              } catch (JSONException e) {
                  LOG.error(e.getLocalizedMessage(), e);
              }
          }
          if (result == null) {
              result = new JSONObject();
          }
          return result;
      }
docs: Reads the users folder filters from the additional info.<p>
  
  @return the folder filters