Deep Cloning in Yui3

How does one 开发者_C百科deep clone an object in YUI3 ? In jquery it would be typically done as follows

var clone = jQuery.extend(true, {}, object);

Use the clone method provided by the oop module.

YUI().use("oop", function (Y) {
        var obj = { foo: ["bar", "baz", "biz"] },
        clone = Y.clone(obj, true);
    });