public Integer get(int index) {
      checkElementIndex(index, size());
      return array[start + index];
    }

    @Override
    /*
     * This is an override that is not directly visible to callers, so NewApi will catch calls to
     * Collection.spliterator() where necessary.
     */
    @IgnoreJRERequirement
    public Spliterator.OfInt spliterator() {
      return Spliterators.spliterator(array, start, end, 0);
    }

    @J2ObjCIncompatible
    REAL_CALLER {
      // We call the method only after checking that it's present.
      @IgnoreJRERequirement
      @SuppressWarnings({
        "Java8ApiChecker",
        "NewApi",
        // This method is a helper, which we call from a `finally` block, as recommended.
        "ReachabilityFenceUsage",
      })
      @Override
      void reachabilityFence(@Nullable Object o) {