* under GWT.
     */
    return true;
  }

  static void restoreInterruptIfIsInterruptedException(Throwable t) {}

  static void interruptCurrentThread() {}

  static void rethrowIfErrorOtherThanStackOverflow(Throwable t) {
    if (t instanceof Error) {
      // There is no StackOverflowError under GWT/J2CL.
      throw (Error) t;
    }
  }

    checkNotNull(t); // to satisfy NullPointerTester
    if (t instanceof InterruptedException) {
      currentThread().interrupt();
    }
  }

  static void interruptCurrentThread() {
    Thread.currentThread().interrupt();
  }

  static void rethrowIfErrorOtherThanStackOverflow(Throwable t) {
    checkNotNull(t);
    if (t instanceof Error && !(t instanceof StackOverflowError)) {

    checkNotNull(t); // to satisfy NullPointerTester
    if (t instanceof InterruptedException) {
      currentThread().interrupt();
    }
  }

  static void interruptCurrentThread() {
    Thread.currentThread().interrupt();
  }

  static void rethrowIfErrorOtherThanStackOverflow(Throwable t) {
    checkNotNull(t);
    if (t instanceof Error && !(t instanceof StackOverflowError)) {