boilerplate notice, with the fields enclosed by brackets "[]"
      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a
      file or class name and description of purpose be included on the
      same "printed page" as the copyright notice for easier

      boilerplate notice, with the fields enclosed by brackets "[]"
      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a
      file or class name and description of purpose be included on the
      same "printed page" as the copyright notice for easier

      }

      T get() {
        /*
         * requireNonNull is safe because we call get() only if we've previously called set().
         *
         * (For further discussion of nullness, see the comment above the method.)
         */
        return requireNonNull(value);
      }
    }
    OptionalState state = new OptionalState();

    Deque<Spliterator<T>> splits = new ArrayDeque<>();

  }

  private @Nullable Object[] requireValues() {
    return requireNonNull(values);
  }

  /*
   * The following methods are safe to call as long as the conditions in the *previous* comment are
   * met *and* the index is less than size().
   *
   * (The above explains when these methods are safe from a `nullness` perspective. From an

   */
  @CanIgnoreReturnValue
  public static int checkElementIndex(int index, int size, String desc) {
    // Carefully optimized for execution by hotspot (explanatory comment above)
    if (index < 0 || index >= size) {
      throw new IndexOutOfBoundsException(badElementIndex(index, size, desc));
    }
    return index;
  }

    TypeToken<List<String>> a = new TypeToken<List<String>>() {};
    TypeToken<List<String>> b = new TypeToken<List<String>>() {};
    assertEquals(a, b);
  }

  @SuppressWarnings("TestExceptionChecker") // see comment below
  public <T> void testVariableTypeTokenNotAllowed() {
    /*
     * We'd use assertThrows here, but that causes no exception to be thrown under Java 8,

    }

    public void test_normalizeConfigPath_edgeCases() {
        assertEquals("", systemHelper.normalizeConfigPath("   "));
        assertEquals("", systemHelper.normalizeConfigPath("#comment line"));
        assertEquals("test", systemHelper.normalizeConfigPath("  test  "));
    }

    public void test_encodeUrlFilter_specialChars() {
        systemHelper.filterPathEncoding = "UTF-8";

labels.advance_search_occt=Szukaj w
labels.advance_search_occt_default=Cała strona
labels.advance_search_occt_allintitle=Tytuł strony
labels.advance_search_occt_allinurl=URL strony
labels.advance_search_sitesearch=Witryna lub domena
labels.advance_search_timestamp=Data aktualizacji
labels.advance_search_timestamp_default=Dowolna data
labels.advance_search_timestamp_pastday=Ostatnie 24 godziny
labels.advance_search_timestamp_pastweek=Ostatni tydzień

    TypeToken<List<String>> a = new TypeToken<List<String>>() {};
    TypeToken<List<String>> b = new TypeToken<List<String>>() {};
    assertEquals(a, b);
  }

  @SuppressWarnings("TestExceptionChecker") // see comment below
  public <T> void testVariableTypeTokenNotAllowed() {
    /*
     * We'd use assertThrows here, but that causes no exception to be thrown under Java 8,

  }

  private @Nullable Object[] requireValues() {
    return requireNonNull(values);
  }

  /*
   * The following methods are safe to call as long as the conditions in the *previous* comment are
   * met *and* the index is less than size().
   *
   * (The above explains when these methods are safe from a `nullness` perspective. From an