toDouble

fun <D> ReadOnlyProperty<D, String>.toDouble(): ReadOnlyProperty<D, Double>
fun <D> ReadWriteProperty<D, String>.toDouble(): ReadWriteProperty<D, Double>
fun <D> ReadOnlyProperty<D, String?>.toDouble(): ReadOnlyProperty<D, Double?>
fun <D> ReadWriteProperty<D, String?>.toDouble(): ReadWriteProperty<D, Double?>