DelegatingInvocationHandler(Object delegate) {
      this.delegate = checkNotNull(delegate);
    }

    @Override
    protected Object handleInvocation(Object proxy, Method method, Object[] args) throws Throwable {
      return method.invoke(delegate, args);
    }

    @Override
    public String toString() {
      return "some arbitrary string";
    }
  }

    return new AbstractSet<K>() {
      @Override
      public UnmodifiableIterator<K> iterator() {
        Iterator<Entry<K, V>> entryIterator = backingMap.entrySet().iterator();

        return new UnmodifiableIterator<K>() {
          @Override
          public boolean hasNext() {
            return entryIterator.hasNext();
          }

          @Override
          public K next() {

            this(URLUtil.toFile(url), rootPackage, rootDir);
        }

        @Override
        public boolean isExistClass(final String className) {
            final File file = new File(baseDir, toClassFile(ClassUtil.concatName(rootPackage, className)));
            return file.exists();
        }

        @Override
        public void forEach(final ClassHandler handler) {

            defaultResponseHeaders = Collections.emptyList();
        }
    }

    @Override
    public FormMappingOption adjustFormMapping() {
        return new FormMappingOption()
                .filterSimpleTextParameter((parameter, meta) -> parameter.trim().replace("\r\n", "\n").replace('\r', '\n'));
    }

    @Override
    public String customizeActionMappingRequestPath(final String requestPath) {

    private static final TimeZone DEFAULT_SNAPSHOT_TIME_ZONE = TimeZone.getTimeZone("Etc/UTC");

    private String deploymentTimestamp;

    @Override
    public void transformForResolve(Artifact artifact, RepositoryRequest request) throws ArtifactResolutionException {
        // Only select snapshots that are unresolved (eg 1.0-SNAPSHOT, not 1.0-20050607.123456)

    }
  }

  ImmutableSortedMultiset() {}

  @Override
  public final Comparator<? super E> comparator() {
    return elementSet().comparator();
  }

  @Override
  public abstract ImmutableSortedSet<E> elementSet();

  @LazyInit transient @Nullable ImmutableSortedMultiset<E> descendingMultiset;

  @Override
  public ImmutableSortedMultiset<E> descendingMultiset() {

    }

    /**
     * Delays after processing a URL.
     */
    @Override
    protected void delayAfterProcessing() {
        if (delayMillisAfterProcessing > 0) {
            ThreadUtil.sleep(delayMillisAfterProcessing);
        }
    }

    /**
     * Delays when no URL is in the queue.
     */
    @Override
    protected void delayAtNoUrlInQueue() {
        if (delayMillisAtNoUrlInQueue > 0) {

            project.getModel().addDependency(dependency);
        }

        @Override
        public void afterSessionStart(MavenSession session) {
            session.getUserProperties().setProperty("injected", "bar");
        }
    }

    public static class InjectReactorDependency extends AbstractMavenLifecycleParticipant {
        @Override
        public void afterProjectsRead(MavenSession session) {

          #Comma separated list of labels that can be assigned to issues to exclude them from being marked as stale
          exempt-issue-labels: 'override-stale'
          #Comma separated list of labels that can be assigned to PRs to exclude them from being marked as stale
          exempt-pr-labels: "override-stale"
          #Limit the No. of API calls in one run default value is 30.
          operations-per-run: 1000
          days-before-issue-stale: 7

  @GwtIncompatible // ConcurrentLinkedQueue
  static class QueuingRemovalListener<K, V> extends ConcurrentLinkedQueue<RemovalNotification<K, V>>
      implements RemovalListener<K, V> {

    @Override
    public void onRemoval(RemovalNotification<K, V> notification) {
      add(notification);
    }
  }

  /**
   * {@link RemovalListener} that counts each {@link RemovalNotification} it receives, and provides