test/Import/import-overrides/Inputs/Hierarchy.cpp - clang - Git at Google

 class Base {
 public:
   virtual void foo() {}
 };

 class Derived : public Base {
 public:
   void foo() override {}
 };
	class Base {
	public:
	virtual void foo() {}
	};

	class Derived : public Base {
	public:
	void foo() override {}
	};