*<Null safety>*
const NullableUnionType<T extends XUnion>({required Map<int, FidlType<dynamic, Iterable>> members, required XUnionFactory<T> ctor, required bool flexible, required bool resource})
Implementation
const NullableUnionType(
{required this.members,
required this.ctor,
required this.flexible,
required this.resource})
: super(inlineSize: 24);