* Wraps a {@code Runnable} for submission to the underlying executor. The default implementation
   * delegates to {@link #wrapTask(Callable)}.
   */
  protected Runnable wrapTask(Runnable command) {
    Callable<Object> wrapped = wrapTask(Executors.callable(command, null));
    return () -> {
      try {
        wrapped.call();
      } catch (Exception e) {
        restoreInterruptIfIsInterruptedException(e);
        throwIfUnchecked(e);