public interface A { public abstract @org.jetbrains.annotations.NotNull method foo(@org.jetbrains.annotations.NotNull p0: java.lang.Number): java.lang.String } public final class DelegationGenericArgUpperBoundKt { public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String } public final class Derived { private synthetic final field $$delegate_0: A public method (@org.jetbrains.annotations.NotNull p0: A): void public @org.jetbrains.annotations.NotNull method foo(p0: int): java.lang.String public synthetic method foo(p0: java.lang.Number): java.lang.String }