byNullableLong

fun JsonObject?.byNullableLong(key: String? = null, default: JsonObjectDefaultSelector<Long?>): JsonDelegateProperty<Long?>
fun JsonObject?.byNullableLong(key: String? = null, default: Long?): JsonDelegateProperty<Long?>
fun JsonObject?.byNullableLong(key: String): JsonDelegateProperty<Long?>
val JsonObject?.byNullableLong: JsonDelegateProperty<Long?>