MavenSession session = legacySupport.getSession();

        if (plugin.getVersion() == null) {
            PluginVersionRequest versionRequest = new DefaultPluginVersionRequest(
                    plugin, session.getRepositorySession(), project.getRemotePluginRepositories());
            plugin.setVersion(pluginVersionResolver.resolve(versionRequest).getVersion());
        }

        try {

        // Setup request session
        lenient().when(request.getSession()).thenReturn(session);
        lenient().when(request.getSession(false)).thenReturn(session);
        lenient().when(request.getSession(true)).thenReturn(session);

        // Setup default session attribute behavior

        MavenSession session = mock(MavenSession.class);
        when(session.getTopLevelProject()).thenReturn(rootProject);
        when(session.getTopDirectory()).thenReturn(basedir.toPath());
        when(event.getSession()).thenReturn(session);

        // execute
        executionEventLogger.projectStarted(event);

        // verify
        InOrder inOrder = inOrder(logger);
        inOrder.verify(logger).info("");

        InternalSession session = InternalSession.from(request.getSession());
        return session.request(request, this::doBuild);
    }

    protected ProjectBuilderResult doBuild(ProjectBuilderRequest request)
            throws ProjectBuilderException, IllegalArgumentException {
        InternalMavenSession session = InternalMavenSession.from(request.getSession());

        // Propagate the parallel flag to the root session and all the cloned sessions in each project segment
        session.setParallel(parallel);
        for (ProjectSegment segment : projectBuilds) {
            segment.getSession().setParallel(parallel);
        }
        ExecutorService executor = Executors.newFixedThreadPool(nThreads, new BuildThreadFactory());
        CompletionService<ProjectSegment> service = new ExecutorCompletionService<>(executor);

        @Override
        public Toolchain getToolchainFromBuildContext(String type, MavenSession session) {
            return getDelegate()
                    .getToolchainFromBuildContext(session.getSession(), type)
                    .map(ToolchainManagerFactory.this::getToolchainV3)
                    .orElse(null);
        }

        @Override

        boolean missing = event.getFile() == null;
        if (missing) {
            // missing artifact - let's track the path anyway
            File dir = event.getSession().getLocalRepository().getBasedir();
            dir = new File(
                    dir, event.getSession().getLocalRepositoryManager().getPathForLocalArtifact(event.getArtifact()));
            trackingDir = dir.getParentFile().toPath().resolve(".tracking");
        } else {

                resp.flushBuffer();
                return null;
            }
            req.getSession().setAttribute("NtlmHttpAuth", ntlm);
        } else if (!skipAuthentication) {
            final HttpSession ssn = req.getSession(false);
            if (ssn == null || (ntlm = (NtlmPasswordAuthentication) ssn.getAttribute("NtlmHttpAuth")) == null) {

    @Test
    void testService_NoAuthHeader_NoSession() throws ServletException, IOException {
        ntlmServlet.init(servletConfig);
        when(request.getHeader("Authorization")).thenReturn(null);
        when(request.getSession(false)).thenReturn(null);
        lenient().when(request.isSecure()).thenReturn(true);

        ntlmServlet.service(request, response);

        verify(response).setHeader("WWW-Authenticate", "NTLM");

     * @return a new {@link DependencyCoordinates} object
     *
     * @throws IllegalArgumentException if {@code request} is null or
     *         if {@code request.getSession()} is null or invalid
     */
    @Nonnull
    DependencyCoordinates create(@Nonnull DependencyCoordinatesFactoryRequest request);

    @Nonnull