* well. Any subsequent {@code getXXX} method invocation attempt will fail with {@link IllegalStateException}.
 */
public class RepositorySystemSupplier implements Supplier<RepositorySystem> {
    private final AtomicBoolean closed = new AtomicBoolean(false);

    public RepositorySystemSupplier() {}

    private void checkClosed() {
        if (closed.get()) {
            throw new IllegalStateException("Supplier is closed");

        @SuppressWarnings("unused")
        static RepositorySystemSupplier newRepositorySystemSupplier() {
            return new RepositorySystemSupplier();
        }

        @Provides
        @SuppressWarnings("unused")
        static RepositorySystem newRepositorySystem(RepositorySystemSupplier repositorySystemSupplier) {
            return repositorySystemSupplier.getRepositorySystem();
        }

        @Provides