var setterVisibility: String = "abc" // Initializer required, not a nullable type
    private set // the setter is private and has the default implementation

参见:属性Getter和Setter

你可以使用以下方法轻松做到这一点:

var atmosphericPressure: Double = 760.0
    get() = field
    private set(value) { 
        field = value 
    }

看看这个故事:Medium: Property, Getter和Setter in Kotlin。