reduce method

@override Sort reduce()

Tries to simplify the Sort structure to avoid redundancy.

Implementation

@override
Sort reduce() {
  final reducedSorts = sorts
      .map((e) => e.reduce())
      .where((element) => !element.isEmpty)
      .toList(growable: false);

  if (reducedSorts.isEmpty) {
    return Sort.empty;
  }

  return SortGroup(reducedSorts);
}