`final val` cannot be overridden. I think you need...

# getting-started

[marstran]

final val cannot be overridden. I think you need to use it explicitly only if you inherit the property from another class. I found this in the docs: "A member marked override is itself open, i.e. it may be overridden in subclasses. If you want to prohibit re-overriding, use final."