如何检查一个对象是否是Haxe中给定类的后代？

class MyClass {}

class MySubClass extends MyClass {}

class Main {
    static function main() {
        var obj:MyClass = new MySubClass();
        
        if (Std.is(obj, MyClass)) {
            trace("obj is a descendant of MyClass");
        } else {
            trace("obj is not a descendant of MyClass");
        }
    }
}