  private static final _Fields optionals[] = {_Fields.TYPE,_Fields.BUCK_BUILD_ID,_Fields.PAYLOADS,_Fields.FETCH_REQUEST,_Fields.STORE_REQUEST,_Fields.MULTI_FETCH_REQUEST,_Fields.DELETE_REQUEST,_Fields.MULTI_CONTAINS_REQUEST,_Fields.MANIFEST_APPEND_REQUEST,_Fields.MANIFEST_FETCH_REQUEST,_Fields.MANIFEST_DELETE_REQUEST,_Fields.MANIFEST_SET_REQUEST};
