allNonNullOrNull method

@useResult IList<T>? allNonNullOrNull()

Implementation

@useResult
IList<T>? allNonNullOrNull() {
  final result = <T>[];
  for (final item in this) {
    if (item == null) {
      return null;
    }
    result.add(item);
  }
  return IList(result);
}