data := []byte(`\u044d\u0442\u043e \u0442\u0435\u0441\u0442 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435`) fmt.Println(unigo.EncodeToString(data) // prints: это тест сообщение
or:
fmt.Println(unigo.EncodeToString([]byte(`{"key":"wasn\u0027t"}`))) // prints: {"key":"wasn't"}
At the usual place.
There was a discussion on go-nuts that seemed to call out for such a utility.