pkg/front_end/testcases/patterns/issue51871.dart.textual_outline.expect

T id<T>(T t) => t;
typedef IntFn = int Function(int);
typedef TFn = T Function<T>(T);

abstract class CompareBase {
  operator <(IntFn f);
}

class Compare extends CompareBase {
  @override
  operator <(Object f) => f is TFn;
}

test1(CompareBase x) {}
main() {}