Person.kt

<!-- Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 -->

class Person(name: String, var lastname: String) {
   var name: String = name
       set(value) {
           field = value.toLowerCase().capitalize()
           updateCount++
       }
   var updateCount = 0
}

Hi. I may be wrong but I think it should be :
field =value.toLowerCase().capitalize