ProjectIndex projectIndex = session.getSession()
                            .getData()
                            .computeIfAbsent(PROJECT_INDEX, () -> new ProjectIndex(session.getProjects()));

                    int index = projectIndex.getIndices().get(projectId);

                    MavenProject forkedProject = projectIndex.getProjects().get(projectId);

        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<>();