public DisclosureTriangle(FNSButton disclosureButton) : base(disclosureButton) { disclosureButton.TranslatesAutoresizingMaskIntoConstraints = false; disclosureButton.SetButtonType(NSButtonType.PushOnPushOff); disclosureButton.BezelStyle = NSBezelStyle.Disclosure; disclosureButton.Title = string.Empty; disclosureButton.Highlight(false); }