In file included from crash_on_invalid.cpp:5:
./crash_on_invalid.h:16:30: error: unknown template name 'GarbageCollectedFinalized'
class Gamepad final : public GarbageCollectedFinalized<Gamepad>,
                             ^
./crash_on_invalid.h:20:19: error: unknown type name 'WrapperTypeInfo'
    virtual const WrapperTypeInfo *wrapperTypeInfo() const {}
                  ^
2 errors generated.