llvm-project/lldb/test/API/lang/cpp/nested-class-other-compilation-unit/shared.h

struct OuterX {
  template<typename T>
  struct Inner {
    int oX_inner = 42;
  };
};

struct OuterY {
  template<typename T>
  struct Inner {
    typename OuterX::Inner<T> oY_inner;
  };
};

struct WrapperB;

WrapperB* foo();