sort method

dynamic sort()

Implementation

sort() {
  dateCategories.sort((a, b) => b.dateTime.compareTo(a.dateTime));

  for (var category in dateCategories) {
    category.files.sort((a, b) {
      if (a.medium == null) {
        return 1;
      } else if (b.medium == null) {
        return -1;
      } else {
        return b.medium!.lastDate!.compareTo(a.medium!.lastDate!);
      }
    });
  }
}