/unstableSmartCastOnInvokeReceiver.fir.kt:(193,208): error: Reference has a nullable type 'Function0<Int>?'. Use explicit '?.invoke' to make a function-like call instead.

/unstableSmartCastOnInvokeReceiver.fir.kt:(283,298): error: Smart cast to 'Function0<Int>' is impossible, because 'interfaceMethod' is a property that has an open or custom getter. Use explicit '?.invoke' to make a function-like call instead.
