Is it possible to implement Command Pattern by using UnityScript?

This is doable by using C#, but is this possible by using UnityScript (Considering that we cannot use interface nor abstract keywords)?

Edited:
You CAN use interface, please see below.

You can implement the Command Pattern in UnityScript. The interface keyword is available and can be used with UnityScript. The abstract keyword, as far as I know can not be used.

You would create your interface normally, then implement where ever by using the implements keyword, like in Java.

//InterfaceTest.js
#pragma strict
    public interface InterfaceTest{
    
    function Command();
    
    }

//MyScript.js
#pragma strict

public class MyScript implements InterfaceTest{


function Command(){}

}

All UnityScript functions are marked virtual by default. So losing one level of abstraction is acceptable to me.