private final ProjectBuildingRequest request;
        private final InternalSession session;
        private final ModelBuilder.ModelBuilderSession modelBuilderSession;
        private final Map<String, MavenProject> projectIndex = new ConcurrentHashMap<>(256);

        // Store computed repositories per project to avoid leakage between projects
        private final Map<String, List<ArtifactRepository>> projectRepositories = new ConcurrentHashMap<>();