demo.kt

val UserPage_UniqueUserNavType: NavType<User> = object : NavType<User>(false) {
    override val name: String
        get() = "uniqueUser"
  
    override fun get(bundle: Bundle, key: String): .User? {
        return bundle.getParcelable(key)
    }
  
    override fun parseValue(value: String): User {
        return gson.fromJson(value, object : TypeToken<User>() {}.type)
    }
  
    override fun put(bundle: Bundle, key: String, value: User) {
        bundle.putParcelable(key, value)
    }
}