YUI().use('event', 'base', function(Y) {

    var Foo = function() {
        Foo.superclass.constructor.apply(this, arguments);
    };
    Y.extend(Foo, Y.Base, {
    }, {
        NAME: 'foo'
    });

    var Bar = function() {
        Bar.superclass.constructor.apply(this, arguments);
    };
    Y.extend(Bar, Y.Base, {
        _prevFn: function() {
            console.info('Bar::Event Prevented Function..');
        },
        _defFn: function() {
            console.info('Bar::Event Default Function..');
        },
        initializer: function() {
            this.publish('event', {
                defaultFn: this._defFn,
                preventedFn: this._prevFn,
                emitFacade: true,
                bubbles: true,
                prefix: 'bar'
            });
        }
    }, {
        NAME: 'bar'
    });

    var b = new Bar();
    b.on('bar:event', function(e) {
        console.info('Single Instance Prevented');
        e.preventDefault();
    });
    console.log('Single Instance Fire');
    b.fire('bar:event');


    var f = new Foo();
    var b1 = new Bar();
    b1.addTarget(f);
    f.on('bar:event', function(e) {
        console.info('Bubble Instance Prevented');
        e.preventDefault();
    });
    console.log('Bubbled Instance Fire');
    b1.fire('bar:event');


});