}

  @Override
  public void testKeySetRemoveAllNullFromEmpty() {
    try {
      super.testKeySetRemoveAllNullFromEmpty();
    } catch (RuntimeException tolerated) {
      // GWT's HashMap.keySet().removeAll(null) doesn't throws NPE.
    }
  }

  @Override
  public void testEntrySetRemoveAllNullFromEmpty() {
    try {
      super.testEntrySetRemoveAllNullFromEmpty();

    }

    public List<CoreExtensionEntry> loadCoreExtensions(
            MavenExecutionRequest request, Set<String> providedArtifacts, List<CoreExtension> extensions)
            throws Exception {
        try (CloseableSession repoSession = repositorySystemSessionFactory
                .newRepositorySessionBuilder(request)
                .setWorkspaceReader(new MavenChainedWorkspaceReader(request.getWorkspaceReader(), ideWorkspaceReader))

    }

    private static Object getIndexedValue(
            final String expression, final int from, final int to, final Object value, final String indexStr)
            throws IntrospectionException {
        try {
            int index = Integer.parseInt(indexStr);

            if (value.getClass().isArray()) {
                return Array.get(value, index);
            }

            if (value instanceof List list) {

        ToolchainsParseException parseException = new ToolchainsParseException("MESSAGE", 4, 2);
        doThrow(parseException).when(toolchainsReader).read(any(InputStream.class), ArgumentMatchers.anyMap());

        try {
            toolchainBuilder.build(request);
        } catch (ToolchainsBuildingException e) {
            assertEquals(
                    "1 problem was encountered while building the effective toolchains" + LS

    class MyError extends Error {}
    CyclicBarrier barrier = new CyclicBarrier(2);
    // we need to make sure the error gets thrown on a different thread.
    ExecutorService service = newSingleThreadExecutor();
    try {
      SequentialExecutor executor = new SequentialExecutor(service);
      Runnable errorTask =
          new Runnable() {
            @Override
            public void run() {
              throw new MyError();

    public static final String CHILDREN_COMBINATION_APPEND = "append";
    /**
     * Default mode for combining children DOMs during merge.
     * When element names match, the process will try to merge the element data,
     * rather than putting the dominant and recessive elements as siblings.
     */
    public static final String DEFAULT_CHILDREN_COMBINATION_MODE = CHILDREN_COMBINATION_MERGE;

          iterator.next();
        });
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testRemoveIf_unsupportedEmptyCollection() {
    try {
      assertFalse(
          "removeIf(Predicate) should return false or throw UnsupportedOperationException",
          collection.removeIf(
              x -> {

        } else if (StringUtils.isNotEmpty(file.getMissing())) {
            path = file.getMissing();
            missing = true;
        } else {
            return false;
        }

        try {
            path = profileActivationFilePathInterpolator.interpolate(path, context);
        } catch (InterpolationException e) {
            problems.add(new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)

    for (Type type : types) {
      if (type == null || !visited.add(type)) {
        // null owner type, or already visited;
        continue;
      }
      boolean succeeded = false;
      try {
        if (type instanceof TypeVariable) {
          visitTypeVariable((TypeVariable<?>) type);
        } else if (type instanceof WildcardType) {
          visitWildcardType((WildcardType) type);

          @Override
          public boolean contains(@Nullable Object object) {
            if (object instanceof Entry<?, ?> && ((Entry<?, ?>) object).getKey() == null) {
              return false;
            }
            try {
              return super.contains(object);
            } catch (ClassCastException e) {
              return false;
            }
          }

          @Override