PluginObserver

gistfile1.js

function PluginObserver() {
  this.publish('plug', {
    emitFacade: true,
    defaultFn: '_plug'
  });
  this.publish('unplug', {
    emitFacade: true,
    defaultFn: '_unplug'
  });
}
PluginObserver.prototype.plug = function (plugin, config) {
  this.fire('plug', { plugin: plugin, config: config });
  return this;
};
PluginObserver.prototype._plug = function (e) {
  Y.Widget.prototype.plug.call(this, e.plugin, e.config);
};
PluginObserver.prototype.unplug = function (plugin) {
  this.fire('unplug', { plugin: plugin });
  return this;
};
PluginObserver.prototype._unplug = function (e) {
  Y.Widget.prototype.unplug.call(this, e.plugin);
};

Y.MyWidget = Y.Base.create('myWidget', Y.Widget, [PluginObserver]);

I don't know if it works