session = Session()
    try:
        yield session
    finally:
        session.open = False


def dep_session() -> Any:
    with acquire_session() as s:
        yield s


def broken_dep_session() -> Any:
    with acquire_session() as s:
        s.open = False
        yield s


SessionDep = Annotated[Session, Depends(dep_session)]

     */
    @Nonnull
    default List<Toolchain> getToolchains(@Nonnull Session session, @Nonnull String type)
            throws ToolchainManagerException {
        return getToolchains(session, type, null);
    }

    /**
     * Retrieves the currently active toolchain from the build context.
     *
     * @param session The Maven session context
     * @param type The type of toolchain to retrieve

        DefaultRepositorySystemSession session = new DefaultRepositorySystemSession(h -> false);
        session.setScopeManager(new ScopeManagerImpl(Maven4ScopeManagerConfiguration.INSTANCE));
        session.setArtifactDescriptorPolicy(new SimpleArtifactDescriptorPolicy(true, true));
        DependencyTraverser depTraverser = new FatArtifactTraverser();
        session.setDependencyTraverser(depTraverser);

    private final Type type;

    private final MavenSession session;

    private final MojoExecution mojoExecution;

    private final Exception exception;

    DefaultExecutionEvent(Type type, MavenSession session, MojoExecution mojoExecution, Exception exception) {
        this.type = type;
        this.session = session;
        this.mojoExecution = mojoExecution;
        this.exception = exception;
    }

        MojoExecutorStub mojoExecutor = new MojoExecutorStub() {
            @Override
            public void execute(MavenSession session, List<MojoExecution> mojoExecutions)
                    throws LifecycleExecutionException {
                super.execute(session, mojoExecutions);
                currentProjects.add(session.getCurrentProject());
            }
        };

    public static RepositoryRequest getRepositoryRequest(MavenSession session, MavenProject project) {
        RepositoryRequest request = new DefaultRepositoryRequest();

        request.setLocalRepository(session.getLocalRepository());
        if (project != null) {
            request.setRemoteRepositories(project.getPluginArtifactRepositories());
        }
        request.setOffline(session.isOffline());

                new DefaultArtifact("org.apache.maven.its", "dep-mng5324", "classifierB", "jar", "07.20.3-SNAPSHOT");
        requestB.setArtifact(artifactB);

        VersionResult resultB = versionResolver.resolveVersion(session, requestB);
        assertEquals("07.20.3-20120809.112920-97", resultB.getVersion());

        VersionRequest requestA = new VersionRequest();
        requestA.addRepository(newTestRepository());

        MavenSession session = legacySupport.getSession();

        PluginDescriptor pluginDescriptor;
        try {
            pluginDescriptor = pluginManager.getPluginDescriptor(
                    plugin, session.getCurrentProject().getRemotePluginRepositories(), session.getRepositorySession());

            pluginManager.setupPluginRealm(pluginDescriptor, session, null, null, null);

 *           type-safe session handling in specific request implementations
 *
 * @see ProtoSession
 * @see RequestTrace
 * @see Result
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface Request<S extends ProtoSession> {

    /**
     * Returns the session associated with this request.
     *
     * @return the session instance, never {@code null}
     */
    @Nonnull

    /**
     * Invoked just before session is created with proto session instance. The proto session contains user and
     * system properties collected so far, along with other information. This method should return altered
     * (contributions applied) user properties, not only the "new" or "added" properties!
     *
     * @param protoSession The proto session, never {@code null}.