message A {
    repeated group EntryResponse = 1 {
        required ResponseType response_type = 2;
        optional string id_string = 3;
        optional string parent_id_string = 4;
        optional int64 position_in_parent = 5;
        optional int64 version = 6;
        optional string name = 7;
        optional string non_unique_name = 8;
        optional string error_message = 9;
        optional int64 mtime = 10;
    }

    message ResponseType {}
}