assertTrue(toString.contains("repositories="));
    }

    @Test
    void testRequestTraceIntegration() {
        Session session = mock(Session.class);
        RequestTrace trace = new RequestTrace("test-context", null, "test-data");

        ArtifactInstallerRequest request =
                ArtifactInstallerRequest.builder().session(session).trace(trace).build();

        return new DependencyCoordinatesFactoryRequestBuilder();
    }

    @NotThreadSafe
    class DependencyCoordinatesFactoryRequestBuilder {
        private Session session;
        private RequestTrace trace;
        private String groupId;
        private String artifactId;
        private String version;
        private String classifier;
        private String extension;
        private String type;

import org.codehaus.plexus.logging.AbstractLogEnabled;
import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.RequestTrace;
import org.eclipse.aether.deployment.DeployRequest;
import org.eclipse.aether.deployment.DeployResult;
import org.eclipse.aether.deployment.DeploymentException;
import org.eclipse.aether.metadata.MergeableMetadata;

        ProtoSession session;
        RequestTrace trace;
        Source installationToolchainsSource;
        Source userToolchainsSource;

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

        public ToolchainsBuilderRequestBuilder trace(RequestTrace trace) {
            this.trace = trace;

 *   <li>Session start time information</li>
 *   <li>Project directory structures</li>
 * </ul>
 *
 * <p>Requests can optionally carry trace information through {@link RequestTrace} to support:
 * <ul>
 *   <li>Debugging and troubleshooting of request flows</li>
 *   <li>Audit logging of operations</li>
 *   <li>Performance monitoring of nested operations</li>
 * </ul>
 *

        return new SettingsBuilderRequestBuilder();
    }

    @NotThreadSafe
    class SettingsBuilderRequestBuilder {
        ProtoSession session;
        RequestTrace trace;
        Source installationSettingsSource;
        Source projectSettingsSource;
        Source userSettingsSource;
        UnaryOperator<String> interpolationSource;

import org.codehaus.plexus.logging.AbstractLogEnabled;
import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.RequestTrace;
import org.eclipse.aether.installation.InstallRequest;
import org.eclipse.aether.installation.InstallationException;
import org.eclipse.aether.util.artifact.SubArtifact;

/**
 */
@Named
@Singleton

     * This builder provides a fluent API for setting the various properties of a request.
     */
    @NotThreadSafe
    class ProjectBuilderRequestBuilder {
        Session session;
        RequestTrace trace;
        Path path;
        Source source;
        boolean allowStubModel;
        boolean recursive;
        boolean processPlugins = true;
        List<RemoteRepository> repositories;

        return new ModelBuilderRequestBuilder(request);
    }

    @NotThreadSafe
    class ModelBuilderRequestBuilder {
        Session session;
        RequestTrace trace;
        RequestType requestType;
        boolean locationTracking;
        boolean recursive;
        ModelSource source;
        Collection<Profile> profiles;
        List<String> activeProfileIds;

                .pathScope(scope)
                .build();
    }

    @NotThreadSafe
    class DependencyResolverRequestBuilder {

        Session session;
        RequestTrace trace;
        RequestType requestType;
        Project project;
        Artifact rootArtifact;
        DependencyCoordinates root;
        List<DependencyCoordinates> dependencies = Collections.emptyList();