aspect demo

aspect

var Widget = require('core/widget');
var subWidget = Widget.extend({
    hello: function() {
        console.log('hello');
    }
});

var widget = new subWidget();

widget.before('hello', function() {
    console.log('before hello');
});
widget.before('hello', function() {
    console.log('before hello 2');
});
widget.hello();