public static void BindHotKey(this NSObject target, NSObject observable, string keyPath)
{
var keyOptions = new NSMutableDictionary();
keyOptions.SetValueForKey(new SRKeyEquivalentTransformer(), Constants.NSValueTransformerBindingOption);
target.Bind("keyEquivalent", observable, keyPath, keyOptions);
var keyModifierOptions = new NSMutableDictionary();
keyModifierOptions.SetValueForKey(new SRKeyEquivalentModifierMaskTransformer(), Constants.NSValueTransformerBindingOption);
target.Bind("keyEquivalentModifierMask", observable, keyPath, keyModifierOptions);
}