Filters the duplicate items from both list. Returns a new list of type T unique items.

distinct_list.dart

/// Mixin containing a helper list method
mixin ListDistinct {
  /// Creates a new list with the unique elements form [listOne] and [listTwo].
  /// The new list is returned  with the specified type [T]
  List<T> distinct<T>(List<T> listOne, List<T> listTwo) {
    final List<T> _newList = <T>[];
    _newList.addAll(listOne);
    for (final T item in listTwo) {
      if (_newList.contains(item)) {
        _newList.remove(item);
      }
      _newList.add(item);
    }
    return _newList;
  }
}