protected BaseRequest(@Nonnull S session, RequestTrace trace) {
        this.session = requireNonNull(session, "session cannot be null");
        this.trace = trace;
    }

    @Nonnull
    @Override
    public S getSession() {
        return session;
    }

    @Override
    public RequestTrace getTrace() {
        return trace;
    }

                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) {

        this.session = copiedSession;
        final ProjectDependencyGraph dependencyGraph = getSession().getProjectDependencyGraph();
        nonTransitiveUpstreamProjects = dependencyGraph.getUpstreamProjects(getProject(), false);
        transitiveUpstreamProjects = dependencyGraph.getUpstreamProjects(getProject(), true);
    }

    public MavenSession getSession() {
        return session;
    }

    public MavenProject getProject() {

                return;
            }
            final HttpSession ssn = request.getSession();
            ssn.setAttribute("NtlmHttpAuth", ntlm);
            ssn.setAttribute("ntlmdomain", ntlm.getDomain());
            ssn.setAttribute("ntlmuser", ntlm.getUsername());
        } else {
            final HttpSession ssn = request.getSession(false);
            if (ssn == null || ssn.getAttribute("NtlmHttpAuth") == null) {

        this.mojoExecution = mojoExecution;
        this.exception = exception;
    }

    @Override
    public Type getType() {
        return type;
    }

    @Override
    public MavenSession getSession() {
        return session;
    }

    @Override
    public MavenProject getProject() {
        return session.getCurrentProject();
    }

    @Override
    public MojoExecution getMojoExecution() {

    }

    public void setArtifactId(String artifactId) {
        this.artifactId = artifactId;
    }

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }

    public String getClassifier() {
        return classifier;
    }

    public void setClassifier(String classifier) {

        project = new Project();
        project.setModelVersion("4.0.0");
        project.setGroupId("org.apache.maven");
        project.setArtifactId("maven-core");
        project.setName("Maven");
        project.setVersion("2.0-SNAPSHOT");
        project.setScm(new Scm());
        project.getScm().setConnection("scm-connection");
        project.addDependency(dependency1);
        project.addDependency(dependency2);

        Metadata metadata = new Metadata();
        metadata.setModelVersion("1.1.0");
        metadata.setGroupId(artifact.getGroupId());
        metadata.setArtifactId(artifact.getArtifactId());
        metadata.setVersion(artifact.getBaseVersion());

        return metadata;
    }

    public void bind(Artifact artifact) {
        artifacts.add(artifact);
    }

    public Object getKey() {

                        parent.getGroupId(),
                        parent.getArtifactId(),
                        parent.getVersion());
            }

            parent.setVersion(versionRangeResult.getHighestVersion().toString());

            return resolveModel(parent.getGroupId(), parent.getArtifactId(), parent.getVersion());
        } catch (final VersionRangeResolutionException e) {

        if (Artifact.LATEST_VERSION.equals(version) || Artifact.RELEASE_VERSION.equals(version)) {
            // meta-versions are not valid <version/> values...don't write them.
            metadata.setVersion(null);
        }

        if (changed || !metadataFile.exists()) {
            metadataFile.getParentFile().mkdirs();
            try (OutputStream output = Files.newOutputStream(metadataFile.toPath())) {