x = x.Deref();
public vValue Intersect(vDescriptor x) {    if (!(x instanceof vSet)) {	iRuntime.error(120, x);    }    vSet rhs = (vSet) x;    vSet result = new vSet((vValue)null);    java.util.Enumeration i;    java.util.Hashtable y = rhs.t;    i = this.t.keys();    while (i.hasMoreElements()) {	Object o = i.nextElement();	if (y.containsKey(o)) {	    result.t.put(o, o);	}    }    return result;}