auto parentObj = ObjectTemplate::New(isolate);
Local<FunctionTemplate> SmthCallBack = FunctionTemplate::New(isolate, FuncCallBack, External::New(isolate, DoSmth));
parentObj->Set(String::NewFromUtf8(isolate, "DoSmth", NewStringType::kNormal).ToLocalChecked(), SmthCallBack);
auto childObj = ObjectTemplate::New(isolate);
Local<FunctionTemplate> SmthElseCallBack = FunctionTemplate::New(isolate, FuncCallBack, External::New(isolate, DoSmthElse));
childObj->Set(String::NewFromUtf8(isolate, "DoSmthElse", NewStringType::kNormal).ToLocalChecked(), SmthElseCallBack);