return new DependencyResolverRequestBuilder()
                .session(session)
                .requestType(requestType)
                .project(project)
                .pathScope(scope)
                .build();
    }

    @Nonnull

    @Nonnull
    default DependencyCoordinates create(@Nonnull Session session, @Nonnull ArtifactCoordinates coordinates) {
        return create(DependencyCoordinatesFactoryRequest.build(session, coordinates));
    }

    @Nonnull
    default DependencyCoordinates create(
            @Nonnull Session session, @Nonnull org.apache.maven.api.Dependency dependency) {

     */
    @Nonnull
    Artifact create(@Nonnull ArtifactFactoryRequest request);

    @Nonnull
    default Artifact create(
            @Nonnull Session session, String groupId, String artifactId, String version, String extension) {
        return create(ArtifactFactoryRequest.build(session, groupId, artifactId, version, extension));
    }

    }

    @NotThreadSafe
    class ToolchainsBuilderRequestBuilder {
        ProtoSession session;
        RequestTrace trace;
        Source installationToolchainsSource;
        Source userToolchainsSource;

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

    }

    @Nonnull
    static SettingsBuilderRequest build(
            @Nonnull ProtoSession session,
            @Nullable Source installationSettingsSource,
            @Nullable Source projectSettingsSource,
            @Nullable Source userSettingsSource) {
        return builder()

    @Nonnull
    static ModelBuilderRequest build(@Nonnull Session session, @Nonnull ModelSource source) {
        return builder()
                .session(requireNonNull(session, "session cannot be null"))
                .source(requireNonNull(source, "source cannot be null"))
                .build();
    }

    @Nonnull
    static ModelBuilderRequest build(@Nonnull Session session, @Nonnull Path path) {
        return builder()

                        false), MESSAGE_TOO_LARGE("Message too large", ErrorCategory.PROTOCOL, false),

        // Resource errors
        OUT_OF_MEMORY("Out of memory", ErrorCategory.RESOURCE, true), TOO_MANY_SESSIONS("Too many sessions", ErrorCategory.RESOURCE,
                true), RESOURCE_LOCKED("Resource is locked", ErrorCategory.RESOURCE, true),

        // Transient errors

        // Session starts with usage count > 0, so acquire/release cycles maintain usage
        assertTrue(session.isInUse(), "Session should be in use initially");

        // Test acquire/release cycles (session remains in use due to initial transport acquire)
        for (int i = 0; i < 3; i++) {
            session.acquire();
            assertTrue(session.isInUse(), "Session should be in use after acquire " + i);

            session.release();

        .build()
    val session = session(heldCertificate.certificatePem())
    assertThat(verifier.verify("foo.com", session)).isFalse()
    assertThat(verifier.verify("bar.com", session)).isFalse()
    assertThat(verifier.verify("k.com", session)).isTrue()
    assertThat(verifier.verify("K.com", session)).isTrue()
    assertThat(verifier.verify("\u2121.com", session)).isFalse()

            return null;
        });
    }

    private OptionalThing<HttpSession> getSession() {
        final HttpSession session = request.getSession(false);
        if (session != null) {
            return OptionalEntity.of(session);
        }
        return OptionalEntity.empty();
    }