library test; | |
import 'dart:async'; | |
class MyFuture<T> implements Future<T> { | |
MyFuture() {} | |
MyFuture.value(T x) {} | |
dynamic noSuchMethod(invocation) => null; | |
MyFuture<S> then<S>(FutureOr<S> f(T x), {Function? onError}) => throw ''; | |
} | |
void test(MyFuture<bool> f) {} | |
main() {} |