class Svc  :2-12
  NestedDefault(int a, int b = G(1, 2)) → int  :3-3
  DeepGenerics(Dictionary<string, List<int>> m) → int  :6-6
  ClosureParam(Func<int, int> cb, int n) → int  :9-9
class Outer  :15-21
  Before(int a) → int  :16-16
  After(int c) → int  :20-20
interface IInner  :17-19
  Handle(int b) → int  :18-18
