FILE: First.kt
    package first

    private final typealias Key = R|kotlin/String|
FILE: Third.kt
    package first

    public open class Base<T> : R|kotlin/Any| {
        public constructor<T>(): R|first/Base<T>| {
            super<R|kotlin/Any|>()
        }

        public final fun get(): R|T?| {
            ^get Null(null)
        }

    }
    public final class Derived : R|first/Base<second/Second.Key>| {
        public constructor(): R|first/Derived| {
            super<R|first/Base<second/Second.Key>|>()
        }

    }
    public final fun test(d: R|first/Derived|): R|kotlin/Unit| {
        R|<local>/d|.R|SubstitutionOverride<first/Derived.get: R|second/Second.Key?|>|()?.{ $subj$.R|second/Second.Key.foo|() }
    }