copy method
Returns a shallow copy of the receiver.
Override this method in all subclasses, return its own type.
Implementation
@override
CastListParser<T, R> copy() => CastListParser<T, R>(delegate);
Returns a shallow copy of the receiver.
Override this method in all subclasses, return its own type.
@override
CastListParser<T, R> copy() => CastListParser<T, R>(delegate);