public void TestByCommandParameterEnumExtensions()
{
var buttons = ((AppVar)_ctrl).LogicalTree().ByType<Button>();
AppVar button4 = buttons.ByCommandParameter(CommandPrameterType.A).Single();
Assert.AreEqual(button4, _ctrl._button4);
button4 = buttons.ByCommandParameter(new ExplicitAppVar(_app.Copy(CommandPrameterType.A))).Single();
Assert.AreEqual(button4, _ctrl._button4);
}