code: public void into(@NonNull RemoteViews remoteViews, @IdRes int viewId, int notificationId,
        @NonNull Notification notification) {
      into(remoteViews, viewId, notificationId, notification, null);
    }
docs: Asynchronously fulfills the request into the specified {@link RemoteViews} object with the
  given {@code viewId}. This is used for loading bitmaps into a {@link Notification}.