* `MutableCollection<String>`.
     *
     * Note that for flexible types, both direct super types of the upper and lower bounds are returned. If that's not desirable, please
     * first call [KaFlexibleType.upperBound] or [KaFlexibleType.lowerBound] and then call this method.
     *

        val expectedExpanded = type.expandedSymbol

        // if the underlying classes are equal, we consider the check successful
        // despite the possibility of different type bounds
        if (
            receiverExpanded != null &&
            receiverExpanded == expectedExpanded
        ) {
            return true
        }

        return actualReceiverType.isSubTypeOf(type)