Make toggleSidebar(_:) available again while firstResponder locates inside nested NSSplitView

MyStackView.swift

import Cocoa

class MyStackView: NSStackView {
    override func responds(to aSelector: Selector!) -> Bool {
        if aSelector == #selector(NSSplitViewController.toggleSidebar(_:)) {
            return false
        }
        return super.responds(to: aSelector)
    }
    
    override func supplementalTarget(forAction action: Selector, sender: Any?) -> Any? {
        if action == #selector(NSSplitViewController.toggleSidebar(_:)) {
            var responder = nextResponder
            while responder != nil && !(responder is NSSplitView) {
                responder = responder?.nextResponder
            }
            if let splitView = responder as? NSSplitView {
                return splitView
            }
        }
        return super.supplementalTarget(forAction: action, sender: sender)
    }
}