: null;
            if (basedir != null) {
                LocalRepository localRepository = session.createLocalRepository(basedir);
                session = InternalSession.from(session.withLocalRepository(localRepository));
            }
            this.session = session;
            this.modelBuilderSession = modelBuilder.newSession();

     *
     * @param localRepository the new local repository
     * @return the derived session
     * @throws NullPointerException if {@code localRepository} is null
     */
    @Nonnull
    Session withLocalRepository(@Nonnull LocalRepository localRepository);

    /**
     * Creates a derived session using the given remote repositories.
     *
     * @param repositories the new list of remote repositories