Where timer_wrap's Start function is set to 'start' which can be accessed from JS
class TimerWrap : public HandleWrap {
public:
static void Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context) {
// ....redacted....
env->SetProtoMethod(constructor, "hasRef", HandleWrap::HasRef);
env->SetProtoMethod(constructor, "start", Start);
env->SetProtoMethod(constructor, "stop", Stop);
// ....redacted....