* If this {@link EndpointPair} {@link #isOrdered()}, returns the node which is the source.
   *
   * @throws UnsupportedOperationException if this {@link EndpointPair} is not ordered
   */
  public abstract N source();

  /**
   * If this {@link EndpointPair} {@link #isOrdered()}, returns the node which is the target.
   *
   * @throws UnsupportedOperationException if this {@link EndpointPair} is not ordered
   */
  public abstract N target();

     * errors by throwing an {@link Exception}. Error conditions should provide
     * sufficient detail to aid troubleshooting.</p>
     *
     * @throws Exception if any issue occurs that prevents the successful execution
     *                   of the Mojo
     */
    void execute() throws Exception;

        TYPE_LABELS.put("regression", "Regressions");
        TYPE_LABELS.put("upgrade", "Upgrades");
    }

    static void update(File templateFile, File outputFile, Map<QualifiedVersion, Set<ChangelogEntry>> changelogs) throws IOException {
        final String templateString = Files.readString(templateFile.toPath());

        try (FileWriter output = new FileWriter(outputFile)) {
            output.write(generateFile(templateString, changelogs));

      throws IOException {
    return appendTo(appendable, iterable(first, second, rest));
  }

  /**
   * Appends the string representation of each of {@code parts}, using the previously configured
   * separator between each, to {@code builder}. Identical to {@link #appendTo(Appendable,
   * Iterable)}, except that it does not throw {@link IOException}.
   */
  @CanIgnoreReturnValue

        new CacheLoader<String, String>() {
          @Override
          public String load(String key) throws InterruptedException {
            int behavior = random.nextInt(4);
            if (behavior == 0) { // throw an exception
              exceptionCount.incrementAndGet();
              throw new RuntimeException("fake exception for test");
            } else if (behavior == 1) { // return null

        new CacheLoader<String, String>() {
          @Override
          public String load(String key) throws InterruptedException {
            int behavior = random.nextInt(4);
            if (behavior == 0) { // throw an exception
              exceptionCount.incrementAndGet();
              throw new RuntimeException("fake exception for test");
            } else if (behavior == 1) { // return null

        callListeners(session, AbstractMavenLifecycleParticipant::afterSessionEnd);
    }

    @FunctionalInterface
    interface ListenerMethod {
        void run(AbstractMavenLifecycleParticipant listener, MavenSession session) throws MavenExecutionException;
    }

    private void callListeners(MavenSession session, ListenerMethod method) throws MavenExecutionException {

  private void writeObject(ObjectOutputStream stream) throws IOException {
    stream.defaultWriteObject();
    stream.writeObject(keyTypeOrObjectUnderJ2cl);
    Serialization.writeMap(this, stream);
  }

  @SuppressWarnings("unchecked") // reading field populated by writeObject
  @GwtIncompatible // java.io.ObjectInputStream
  private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {

  private val delegate: RequestBody

  fun delegate(): RequestBody = delegate

  override fun contentType(): MediaType? = delegate.contentType()

  @Throws(IOException::class)
  override fun contentLength(): Long = delegate.contentLength()

  @Throws(IOException::class)
  override fun writeTo(sink: BufferedSink) {
    delegate.writeTo(sink)
  }

  override fun isDuplex(): Boolean = delegate.isDuplex()

            causes.forEach(exception::addSuppressed);
            throw exception;
        }
    }

    public final void closeContainer() throws Exception {
        if (containerCapsuleManaged) {
            doCloseContainer();
        }
    }

    public void doCloseContainer() throws Exception {
        if (containerCapsule != null) {
            try {