class LongLived {};
 
class Foo
{
  public:
    Foo(LongLived& mutableLongLived)
    : mMutableLongLived(mutableLongLived)
    {}
 
    LongLived& GetC1() { return GetC1Private(); }
    const LongLived& GetC1() const { return GetC1Private(); }
 
  private:
    LongLived& GetC1Private() const {
    	// pretend a bunch of lines of code instead of just returning a single variable
    	return mMutableLongLived;
    }
 
    LongLived& mMutableLongLived;
};
 
int main() {
	LongLived longLiver;
	const Foo foo(longLiver);
	foo.GetC1();
	return 0;
}

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