toLong

fun <D> ReadOnlyProperty<D, String>.toLong(): ReadOnlyProperty<D, Long>
fun <D> ReadWriteProperty<D, String>.toLong(): ReadWriteProperty<D, Long>
fun <D> ReadOnlyProperty<D, String?>.toLong(): ReadOnlyProperty<D, Long?>
fun <D> ReadWriteProperty<D, String?>.toLong(): ReadWriteProperty<D, Long?>