// "Implement abstract class" "true"
// WITH_RUNTIME
// SHOULD_BE_AVAILABLE_AFTER_EXECUTION

class Container {
    inner abstract class Base {
        abstract fun foo(): String
    }

    inner class BaseImpl : Base() {
        override fun foo(): String {
            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
        }
    }
}