* Reset the {@code activeProxy} field to {@code null}.
     */
    public void flushActiveProxy() {
        this.activeProxy = null;
    }

    /**
     * @return the first active proxy
     */
    public synchronized Proxy getActiveProxy() {
        if (activeProxy == null) {
            java.util.List<Proxy> proxies = getProxies();
            if (proxies != null && !proxies.isEmpty()) {

    public ArtifactMetadataRetrievalException(String message) {
        super(message, null, null);
    }

    /**
     * @param cause a cause
     * @deprecated use {@link #ArtifactMetadataRetrievalException(String, Throwable, Artifact)}
     */
    @Deprecated
    public ArtifactMetadataRetrievalException(Throwable cause) {
        super(null, cause, null);
    }

    /**
     * @param message a message

        this.delegate = requireNonNull(delegate, "delegate cannot be null");
        this.childrenTracking = parent != null ? parent::replace : null;
    }

    public BaseObject(Object delegate, ChildrenTracking parent) {
        this.delegate = requireNonNull(delegate, "delegate cannot be null");
        this.childrenTracking = parent;
    }

    public Object getDelegate() {

   * <p>The {@code @Nullable} annotations on the {@code equalityGroup} parameter imply that the
   * objects, and the array itself, can be null. That is for programmer convenience, when the
   * objects come from factory methods that are themselves {@code @Nullable}. In reality neither the
   * array nor its contents can be null, but it is not useful to force the use of {@code
   * requireNonNull} or the like just to assert that.
   *

      when (val protocol = sslSocket.applicationProtocol) {
        null, "" -> null
        else -> protocol
      }
    } catch (e: UnsupportedOperationException) {
      // https://docs.oracle.com/javase/9/docs/api/javax/net/ssl/SSLSocket.html#getApplicationProtocol--
      null
    }

  override fun trustManager(sslSocketFactory: SSLSocketFactory): X509TrustManager? {

     */
    private synchronized void initLifecycleMap() {
        if (lifecycleMap == null) {
            lifecycleMap = new HashMap<>();

            if (lifecycles != null) {
                for (Lifecycle lifecycle : lifecycles) {
                    lifecycleMap.put(lifecycle.getId(), lifecycle);
                }
            } else {

     *
     * @param request The repository request from which this cache was retrieved, must not be {@code null}.
     * @param key The key to use associate the data with, must not be {@code null}.
     * @param data The data to store in the cache, may be {@code null}.
     */
    void put(RepositoryRequest request, Object key, Object data);

    /**

        try {
            return prompter.prompt(message, null, null);
        } catch (org.apache.maven.api.services.PrompterException e) {
            throw new PrompterException("Unable to prompt", e);
        }
    }

    @Override
    public String prompt(String message, String defaultReply) throws PrompterException {
        try {
            return prompter.prompt(message, null, defaultReply);

                            "title": "Email",
                            "anyOf": [{"type": "string"}, {"type": "null"}],
                        },
                        "full_name": {
                            "title": "Full Name",
                            "anyOf": [{"type": "string"}, {"type": "null"}],
                        },
                        "disabled": {
                            "title": "Disabled",

            if (parent != null) {
                // Parent is added as an edge, but must not cause a cycle - so we remove any other edges it has
                // in conflict
                addEdge(
                        projectMap,
                        vertexMap,
                        null,
                        projectVertex,
                        parent.getGroupId(),