addTarget.js

var Y = require('yui').YUI({useSync: true, filter: 'debug' });

Y.use('event-custom', 'oop');

function A(parent) {
    if(parent) {
        this.parent = parent;
        this.addTarget(parent);
    }
}
A.name = 'a';
Y.augment(A, Y.EventTarget, false, null, { emitFacade: true });

var a = new A();
a.on('test', function(e) {
    console.log(e.type);
    console.log(Y.stamp(e.currentTarget));
});
var b = new A(a);
b.on('test', function(e) {
    console.log(e.type);
    console.log(Y.stamp(e.currentTarget));
});

b.fire('test');