}

    public static int repositoriesHashCode(List<RemoteRepository> repositories) {
        int result = 17;
        for (RemoteRepository repository : repositories) {
            result = 31 * result + repositoryHashCode(repository);
        }
        return result;
    }

    public static RepositorySystemSession overlay(
            ArtifactRepository repository, RepositorySystemSession session, RepositorySystem system) {