}

    static class BuildTimestampValueSource extends AbstractValueSource {
        private final Instant startTime;
        private final Map<String, String> properties;

        BuildTimestampValueSource(Instant startTime, Map<String, String> properties) {
            super(false);
            this.startTime = startTime;
            this.properties = properties;
        }

        @Override

        return injector.getInstance(Session.class);
    }

    static class DefaultSession extends AbstractSession {

        private final Map<String, String> systemProperties;
        private Instant startTime = Instant.now();

        DefaultSession(RepositorySystemSession session, RepositorySystem repositorySystem, Lookup lookup) {
            this(session, repositorySystem, Collections.emptyList(), null, lookup);
        }