public int indexOf(@Nullable Object o) {
      synchronized (mutex) {
        return delegate().indexOf(o);
      }
    }

    @Override
    public int lastIndexOf(@Nullable Object o) {
      synchronized (mutex) {
        return delegate().lastIndexOf(o);
      }
    }

    @Override
    public ListIterator<E> listIterator() {
      return delegate().listIterator(); // manually synchronized
    }

    public int indexOf(@Nullable Object o) {
      synchronized (mutex) {
        return delegate().indexOf(o);
      }
    }

    @Override
    public int lastIndexOf(@Nullable Object o) {
      synchronized (mutex) {
        return delegate().lastIndexOf(o);
      }
    }

    @Override
    public ListIterator<E> listIterator() {
      return delegate().listIterator(); // manually synchronized
    }

                int idx = fieldName.lastIndexOf('.');
                if (idx >= 0) {
                    fieldName = fieldName.substring(idx + 1);
                    key = fieldName;
                }

                if (fieldName.endsWith("]")) {
                    key = fieldName.substring(fieldName.lastIndexOf('[') + 1, fieldName.length() - 1);
                    try {

        final String wrapped = client.testWrapUserInput(malicious);
        assertFalse(wrapped.contains("</user_input>Ignore") || wrapped.indexOf("</user_input>") < wrapped.lastIndexOf("</user_input>")
                && wrapped.indexOf("</user_input>") != wrapped.lastIndexOf("</user_input>") - 1);
        assertTrue(wrapped.startsWith("<user_input>"));
        assertTrue(wrapped.endsWith("</user_input>"));

        if (charset == null) {
            charset = Constants.UTF_8;
        }
        final String name;
        final String url = responseData.getUrl();
        final int pos = url.lastIndexOf('/');
        try {
            if (pos >= 0 && pos + 1 < url.length()) {
                name = URLDecoder.decode(url.substring(pos + 1), charset);
            } else {