return 0;
    }

    @Override
    protected int readSetupWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        return 0;
    }

    @Override
    protected int readParametersWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        return 0;
    }

    @Override

  public void testContainsAll_empty() {
    assertTrue(
        "containsAll(empty) should return true", collection.containsAll(MinimalCollection.of()));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testContainsAll_subset() {
    assertTrue(
        "containsAll(subset) should return true",
        collection.containsAll(MinimalCollection.of(e0())));
  }

        return (InputSource) value;
    }

    private Model read(Reader reader, boolean strict, InputSource source) throws IOException {
        try {
            if (source != null) {
                return new MavenXpp3ReaderEx().read(reader, strict, source);
            } else {
                return new MavenXpp3Reader().read(reader, strict);
            }

     */
    protected JsonUtil() {
    }

    /**
     * Escapes a value as Json string.
     *
     * @param value input
     * @return escaped string.
     */
    public static String escape(final String value) {
        if (value == null) {
            return null;
        }

        char c;
        final int len = value.length();
        final StringBuilder buf = new StringBuilder(len * 2);

     * Obtain the {@link ClassRealm} used for Maven Core.
     *
     * @return the class realm of core.
     */
    @Nonnull
    ClassRealm getRealm();

    /**
     * Shorthand method to obtain the {@link ClassWorld} used for Maven Core.
     *
     * @return the class world in use.
     */
    @Nonnull
    default ClassWorld getClassWorld() {
        return getRealm().getWorld();
    }

    checkNotNull(callable);
    checkNotNull(executor);
    return submitAsync(
        new AsyncCallable<T>() {
          @Override
          public ListenableFuture<T> call() throws Exception {
            return immediateFuture(callable.call());
          }

          @Override
          public String toString() {
            return callable.toString();
          }
        },
        executor);
  }

When reading response a header, use `header(name)` to return the _last_ occurrence of the named value. Usually this is also the only occurrence! If no value is present, `header(name)` will return null. To read all of a field's values as a list, use `headers(name)`.

To visit all headers, use the `Headers` class which supports access by index.

            this.throwOnSize = throwOnSize;
        }

        public int getSizeCallCount() {
            return sizeCallCount;
        }

        public int getEncodeCallCount() {
            return encodeCallCount;
        }

        public byte[] getData() {
            return data;
        }
    }

    /**
     * Mock implementation for basic interface testing
     */

   * half of that is more awkward to arrange...
   */
  private static <T> Iterable<T> iterable(Collection<T> collection) {
    // return collection::iterator;
    return new Iterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return collection.iterator();
      }
    };
  }

  public void testEquals() {
    new EqualsTester()

   */
  public static <V extends @Nullable Object> ListenableFuture<V> listenInPoolThread(
      Future<V> future) {
    if (future instanceof ListenableFuture) {
      return (ListenableFuture<V>) future;
    }
    return new ListenableFutureAdapter<>(future);
  }

  /**
   * Submits a blocking task for the given {@link Future} to provide {@link ListenableFuture}
   * functionality.
   *