Kirpal

extension ListExtensions<E> on List<E> {
  List<E> interleave(E inserted, {bool insertAtEnd = false}) {
    final list = expand((item) => [item, inserted]).toList();
    if (!insertAtEnd && list.isNotEmpty) {
      list.removeLast();
    }
    return list;
  }

  List<E> interleave2(E inserted, {bool insertAtEnd = false}) {

Kirpal

class LoadingState<Data> {
  Data? data;
  
  void update({required Data Function() from}) {
    data = from();
  }
  
  bool get isLoaded => data != null;
}