code: private Set<String> readFolderFilters() {
  
          JSONObject storedFilters = readUserFolderFilters();
          Set<String> result = null;
          if (storedFilters.has(getCmsObject().getRequestContext().getSiteRoot())) {
              try {
                  org.opencms.json.JSONArray folders = storedFilters.getJSONArray(
                      getCmsObject().getRequestContext().getSiteRoot());
                  result = new HashSet<String>();
                  for (int i = 0; i < folders.length(); i++) {
                      result.add(folders.getString(i));
                  }
              } catch (JSONException e) {
                  LOG.error(e.getLocalizedMessage(), e);
              }
          }
          return result;
      }
docs: Reads the folder filters for the current site.<p>
  
  @return the folder filters