return ArtifactCoordinateFactoryRequest.builder()
                .session(nonNull(session, "session"))
                .coordinateString(nonNull(coordinateString, "coordinateString"))
                .build();
    }

    @Nonnull
    static ArtifactCoordinateFactoryRequest build(@Nonnull Session session, @Nonnull ArtifactCoordinate coordinate) {

    }

    @NotThreadSafe
    class ToolchainsBuilderRequestBuilder {
        Session session;
        Source globalToolchainsSource;
        Source userToolchainsSource;

        public ToolchainsBuilderRequestBuilder session(Session session) {
            this.session = session;
            return this;
        }

    }

    class ArtifactDeployerRequestBuilder {
        Session session;
        RemoteRepository repository;
        Collection<Artifact> artifacts;
        int retryFailedDeploymentCount;

        ArtifactDeployerRequestBuilder() {}

        @Nonnull
        public ArtifactDeployerRequestBuilder session(Session session) {
            this.session = session;
            return this;
        }

        @Nonnull

     * @throws IllegalArgumentException if an argument is null or invalid
     *
     * @see DependencyCollector#collect(Session, Project)
     * @see DependencyCollector#collect(Session, DependencyCoordinate)
     * @see DependencyCollector#collect(Session, Artifact)
     */
    @Nonnull
    DependencyCollectorResult collect(@Nonnull DependencyCollectorRequest request);

    /**

        return cast(InternalSession.class, session.getData().get(InternalSession.class), "session");
    }

    static void associate(org.eclipse.aether.RepositorySystemSession rsession, Session session) {
        if (!rsession.getData().set(InternalSession.class, null, from(session))) {
            throw new IllegalStateException("A maven session is already associated with the repository session");

    @Nonnull
    List<Toolchain> getToolchains(@Nonnull Session session, String type, Map<String, String> requirements);

    /**
     *
     * @param session
     * @param type
     * @return the selected {@link Toolchain}
     * @throws ToolchainManagerException if an exception occurs
     */
    @Nonnull
    Optional<Toolchain> getToolchainFromBuildContext(@Nonnull Session session, String type)
            throws ToolchainManagerException;

    }

    @Test
    void testNoModels() {
        MavenSession session = mock(MavenSession.class);
        MavenExecutionRequest executionRequest = new DefaultMavenExecutionRequest();
        when(session.getRequest()).thenReturn(executionRequest);

        List<Toolchain> toolchains = toolchainManager.getToolchains(session, "unknown", null);

        assertEquals(0, toolchains.size());
    }

    @Test

        }
    }

    public MavenSession getSession() {
        AtomicReference<MavenSession> currentSession = DefaultLegacySupport.SESSION.get();
        return currentSession != null ? currentSession.get() : null;
    }

    public RepositorySystemSession getRepositorySession() {
        MavenSession session = getSession();

    @Named("scoped")
    @SessionScoped
    @Typed
    static class MySessionScopedBean implements BeanItf {
        @Inject
        Session session;

        @Inject
        BeanItf2 anotherBean;

        public Session getSession() {
            return session;
        }

        public BeanItf2 getAnotherBean() {
            return anotherBean;
        }

import org.apache.maven.api.annotations.ThreadSafe;

/**
 * A container for data that is specific to a session.
 * All components may use this storage to associate arbitrary data with a session.
 * <p>
 * Unlike a cache, this session data is not subject to purging. For this same reason, session data should also not be
 * abused as a cache (i.e. for storing values that can be re-calculated) to avoid memory exhaustion.
 * <p>