NSOutlineView.showHideButtonIdentifier custom button does not respect contentTintColor

I've been trying to provide NSOutlineView with custom disclosure button.

Here is a simple NSButton subclass for that purpose:

Code Block Swift
final class AltDisclosureButton: NSButton {
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
        setButtonType(.toggle)
        isBordered = false
    }
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

Then, in my NSOutlineView subclass, I do this:

Code Block Swift
override func makeView(withIdentifier identifier: NSUserInterfaceItemIdentifier, owner: Any?) -> NSView? {
    var view = super.makeView(withIdentifier: identifier, owner: owner)
    if identifier == NSOutlineView.showHideButtonIdentifier, let button = view as? NSButton {
        let customButton = AltDisclosureButton(frame: .zero)
        customButton.target = button.target
        customButton.action = button.action
        customButton.identifier = identifier
        let image = NSImage(systemSymbolName: "chevron.right.circle.fill", accessibilityDescription: "disclosure_indicator_button")!
        customButton.image =  image
        let altImage = NSImage(systemSymbolName: "chevron.down.circle.fill", accessibilityDescription: "disclosure_indicator_button_down")!
        customButton.alternateImage = altImage
        customButton.symbolConfiguration = NSImage.SymbolConfiguration(pointSize: 16, weight: .medium)
        customButton.contentTintColor = NSColor.controlAccentColor
        view = customButton
     }
    return view
}

It basically sets two SF Symbols images to image and alternateImage respectively.

My problem is that there are only three NSButton.ButtonType values that work with button auto-rotate: .toggle, .switch, .radio, but none of them respect the contentTintColor -- the buttons are always gray.