MavenProject project = request.getProject();

                List<ModelProblem> modelProblems = null;
                Throwable error = null;

                if (project == null) {
                    project = new MavenProject();
                    project.setFile(pomFile != null ? pomFile.toFile() : null);

                    ModelBuildingListener listener =

        if (spec == null) {
            return null;
        }

        VersionRange cached = CACHE_SPEC.get(spec);
        if (cached != null) {
            return cached;
        }

        List<Restriction> restrictions = new ArrayList<>();
        String process = spec;
        ArtifactVersion version = null;
        ArtifactVersion upperBound = null;
        ArtifactVersion lowerBound = null;

                                    .privateKey(null)
                                    .password(null)
                                    .filePermissions(null)
                                    .directoryPermissions(null)
                                    .build())
                            .toList())
                    .build();
        }

        return settings;
    }

     *
     * @param message The detail message, may be {@code null}.
     * @param groupId The group id of the unresolvable model, may be {@code null}.
     * @param artifactId The artifact id of the unresolvable model, may be {@code null}.
     * @param version The version of the unresolvable model, may be {@code null}.
     * @param cause The cause, may be {@code null}.
     */

     * @param algorithms  The checksum algorithms to use, must not be {@code null}.
     * @return The calculated checksums, indexed by algorithms, never {@code null}.
     * @throws NullPointerException if passed in any parameter is {@code null}.
     * @throws IOException In case of any IO problem.
     */
    @Nonnull

        this.projectId = (project != null)
                ? project.getGroupId() + ':' + project.getArtifactId() + ':' + project.getVersion()
                : "";
        this.pomFile = (project != null) ? project.getFile() : null;
        this.project = project;
        this.problems = problems != null ? problems : Collections.emptyList();
        this.dependencyResolutionResult = dependencyResolutionResult;
    }

     * @param type The type of the class realm, must not be {@code null}.
     * @param parent The parent realm for the new realm, may be {@code null}.
     * @param parentImports The packages/types to import from the parent realm, may be {@code null}.
     * @param foreignImports The packages/types to import from foreign realms, may be {@code null}.

        InputStream inputStream = request.getInputStream();
        if (reader == null && inputStream == null) {
            throw new IllegalArgumentException("reader or inputStream must be non null");
        }
        try {
            InputSource source = null;
            if (request.getModelId() != null || request.getLocation() != null) {
                source = new InputSource(request.getLocation());
            }

        return this;
    }

    public void addArtifact(Artifact artifact) {
        if (artifacts == null) {
            artifacts = new LinkedHashSet<>();
        }

        artifacts.add(artifact);
    }

    public Set<Artifact> getArtifacts() {
        if (artifacts == null) {
            artifacts = new LinkedHashSet<>();
        }

        return artifacts;
    }

        InputStream inputStream = request.getInputStream();
        if (reader == null && inputStream == null) {
            throw new IllegalArgumentException("reader or inputStream must be non null");
        }
        try {
            InputSource source = null;
            if (request.getModelId() != null || request.getLocation() != null) {
                source = new InputSource(request.getLocation());
            }