CustomNavTypeExample.kt

class ExampleNavType : NavType<Example>(isNullableAllowed = false) {
    override fun get(bundle: Bundle, key: String): Example? {
        return bundle.getParcelable(key)
    }

    override fun parseValue(value: String): Example {
        return Gson().fromJson(value, Example::class.java)
    }

    override fun put(bundle: Bundle, key: String, value: Example) {
        bundle.putParcelable(key, value)
    }
}