Why does Kotlin require to override both `getter` ...

# announcements

[voddan]

Why does Kotlin require to override both getter and setter on a var even if I want to change one of them?

class BOO (): FOO() {
    override var t: String
    get() = super.t  // why that?
    set(value) {
        println("\t overwritten setter is called")
        super.t = value 
    }
}