while (queue.isNotEmpty()) {
            for (superClass in DescriptorUtils.getSuperclassDescriptors(queue.removeFirst())) {
                when (isLeaf[superClass]) {
                    true -> isLeaf[superClass] = false
                    false -> {}
                    else -> {
                        isLeaf[superClass] = false
                        queue.addLast(superClass)
                    }
                }