code: public static boolean isMergeFolders() {
          Configuration config = ConfigUtils.getCurrentConfig();
          if (config != null) {
              return config.getBoolean(MERGE_FOLDERS_CONFIG_KEY, false);
          } else {
              return false;
          }
      }
docs: Returns true if the sub items of folders with the same family of target IDs should be merged (e.g. "en_US" and
  "en" are of the same family).