<@U3669PPNG> because they intended it to work like...

# getting-started

[Andreas Sinz]

@nkiesel because they intended it to work like that. in https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/with-default.html they say This implicit default value is used when properties are delegated to the returned map, and that map doesn't contain value for the key specified.