final Map<String, Object> defaultSettings = defaultSettings();
            initialSettings.forEach((key, value) -> {
                if (value instanceof Collection) {
                    @SuppressWarnings("unchecked")
                    final Collection<Object> collection = (Collection<Object>) value;
                    collection.forEach(element -> arraySettings.add(new Tuple<>(key, element)));

   * This does perform a little more work than necessary, so another option is to insert an
   * unchecked cast at some later point:
   *
   * {@snippet :
   * @SuppressWarnings("unchecked") // safe because of ::isInstance check
   * ImmutableList<NewType> result =
   *     (ImmutableList) stream.filter(NewType.class::isInstance).collect(toImmutableList());
   * }

   * This does perform a little more work than necessary, so another option is to insert an
   * unchecked cast at some later point:
   *
   * {@snippet :
   * @SuppressWarnings("unchecked") // safe because of ::isInstance check
   * ImmutableList<NewType> result =
   *     (ImmutableList) stream.filter(NewType.class::isInstance).collect(toImmutableList());
   * }

    void sendWithRequestVarargsDelegates() throws Exception {
        // Verifies Request<T> overload forwards to the varargs form with a null response
        @SuppressWarnings("unchecked")
        Request<CommonServerMessageBlockResponse> req = mock(Request.class);
        CommonServerMessageBlockResponse resp = mock(CommonServerMessageBlockResponse.class);

        // Stub tree send for varargs

    //                                                                          Validation
    //                                                                          ==========
    @SuppressWarnings("unchecked")
    /**
     * Creates a validator instance for form validation.
     * This method uses the system helper to create a validator with Fess-specific messages.
     *
     * @return a new action validator instance

public class UnmodifiableCollectionTests {

  public static void assertMapEntryIsUnmodifiable(Entry<?, ?> entry) {
    try {
      // fine because the call is going to fail without modifying the entry
      @SuppressWarnings("unchecked")
      Entry<?, @Nullable Object> nullableValueEntry = (Entry<?, @Nullable Object>) entry;
      nullableValueEntry.setValue(null);
      fail("setValue on unmodifiable Map.Entry succeeded");

    }

    /**
     * Get values from array index.
     * @param index Index
     * @param type Type
     * @param key Key
     * @return Values
     */
    @SuppressWarnings("unchecked")
    protected Map<String, Object>[] getFromArrayIndex(final String index, final String type, final String key) {
        final String actualIndex = index + "." + type.toLowerCase(Locale.ENGLISH);
        try {

   */
  public static <K, V> ImmutableMultimap<K, V> copyOf(Multimap<? extends K, ? extends V> multimap) {
    if (multimap instanceof ImmutableMultimap) {
      @SuppressWarnings("unchecked") // safe since multimap is not writable
      ImmutableMultimap<K, V> kvMultimap = (ImmutableMultimap<K, V>) multimap;
      if (!kvMultimap.isPartialView()) {
        return kvMultimap;
      }
    }

    @Override
    public boolean containsKey(@Nullable Object key) {
      return containsRow(key);
    }

    // performing cast only when key is in backing map and has the correct type
    @SuppressWarnings("unchecked")
    @Override
    public @Nullable Map<C, V> get(@Nullable Object key) {
      // requireNonNull is safe because of the containsRow check.
      return containsRow(key) ? row((R) requireNonNull(key)) : null;
    }

     * @throws Exception
     */
    @Test
    public void testCopy_beanToNewMap_specificClass() throws Exception {
        final MyBean src = new MyBean();
        src.aaa = "aaa";
        @SuppressWarnings("unchecked")
        final Map<String, Object> dest = BeanUtil.copyBeanToNewMap(src, HashMap.class);
        assertThat(dest.get("aaa"), is((Object) "aaa"));
        final BeanMap dest2 = BeanUtil.copyBeanToNewMap(src, BeanMap.class);