Kotlin Proprety Declaration

class Card(private var title: String?, val size: Int) {    // use title    var titleCapitalize: String?        get() = title?.capitalize()        set(value) {            title = value?.toLowerCase()        }    // read only, use size    val isEmpty: Boolean        get() = size == 0    // backing field    var counter10x: Int = 0        get() = field * 10        set(value) {            field = value / 10        }}