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// Return the trap result
function setFoo(x,y) { this.foo = x + y; }
var handler = { construct: function (target, args) { return { foo : args[0] * args[1]}; } }
for (let proxy of [new Proxy(setFoo, handler), Proxy.revocable(setFoo, handler).proxy]) {
var obj1 = new proxy(2, 3);
assertEq(obj1.foo, 6);
obj1.bar = proxy;
var obj2 = new obj1.bar(2, 3);
assertEq(obj2.foo, 6);
}