public static _Fields findByThriftId(int fieldId) {
        switch(fieldId) {
          case 1: // INTERFACE_NAME
            return INTERFACE_NAME;
          case 2: // IMPL_CLASS_NAME
            return IMPL_CLASS_NAME;
          case 3: // CLASS_NAMES
            return CLASS_NAMES;
          case 4: // CLASSES
            return CLASSES;
          default:
            return null;
        }
      }