return DEFAULT_VALIDATION_LEVEL;
        }
    }

    private String pluginKey(String groupId, String artifactId, String version) {
        return groupId + ":" + artifactId + ":" + version;
    }

    private String pluginKey(MojoDescriptor mojoDescriptor) {
        PluginDescriptor pd = mojoDescriptor.getPluginDescriptor();

            return problem.getLocation();
        }

        @Override
        public Exception getException() {
            return problem.getException();
        }

        @Override
        public String getMessage() {
            return problem.getMessage();
        }

        @Override
        public Severity getSeverity() {
            return Severity.valueOf(problem.getSeverity().name());
        }

    }

    final Map<String, Vertex> vertices = new LinkedHashMap<>();

    public Vertex getVertex(String id) {
        return vertices.get(id);
    }

    public Collection<Vertex> getVertices() {
        return vertices.values();
    }

    Vertex addVertex(String label) {
        return vertices.computeIfAbsent(label, Vertex::new);
    }

    void addEdge(Vertex from, Vertex to) throws CycleDetectedException {

        public String getClassifier() {
            return null;
        }

        @Override
        public String getDirectory() {
            return null;
        }

        @Override
        public String getExtension() {
            return "pom";
        }

        @Override
        public String getLanguage() {
            return "none";
        }

        @Override

            case FAMILY_WINDOWS:
                return isWindows;
            case FAMILY_WIN9X:
                return isWindows && is9x;
            case FAMILY_NT:
                return isWindows && isNT;
            case FAMILY_OS2:
                return actualOsName.contains(FAMILY_OS2);
            case FAMILY_NETWARE:
                return actualOsName.contains(FAMILY_NETWARE);
            case FAMILY_DOS:

        }

        return new DefaultToolchainsBuilderResult(effective, problems);
    }

    private boolean hasErrors(List<BuilderProblem> problems) {
        if (problems != null) {
            for (BuilderProblem problem : problems) {
                if (BuilderProblem.Severity.ERROR.compareTo(problem.getSeverity()) >= 0) {
                    return true;
                }
            }
        }

            this.globalToolchainsSource = globalToolchainsSource;
            return this;
        }

        public ToolchainsBuilderRequestBuilder userToolchainsSource(Source userToolchainsSource) {
            this.userToolchainsSource = userToolchainsSource;
            return this;
        }

        public ToolchainsBuilderRequest build() {
            return new ToolchainsBuilderRequestBuilder.DefaultToolchainsBuilderRequest(

            this.outputStream = outputStream;
            return this;
        }

        public XmlWriterRequestBuilder<T> writer(Writer writer) {
            this.writer = writer;
            return this;
        }

        public XmlWriterRequestBuilder<T> content(T content) {
            this.content = content;
            return this;
        }

        public XmlWriterRequest<T> build() {

    }

    public int getLineNumber() {
        return lineNumber;
    }

    public int getColumnNumber() {
        return columnNumber;
    }

    public InputSource getSource() {
        return source;
    }

    public InputLocation getLocation(Object key) {
        return locations != null ? locations.get(key) : null;
    }

            return this;
        }

        @Nonnull
        public ArtifactDeployerRequestBuilder repository(RemoteRepository repository) {
            this.repository = repository;
            return this;
        }

        public ArtifactDeployerRequestBuilder artifacts(Collection<Artifact> artifacts) {
            this.artifacts = artifacts;
            return this;
        }