system:
    default:
        yui:
            modules:
                # use your own prefix, not "ez-"
                ezconf-listapplugin: # module identifier
                    dependencyOf: ['ez-platformuiapp']
                    requires: ['ez-pluginregistry', 'plugin', 'base'] # depends on the plugin code
                    path: %extending_platformui.public_dir%/js/apps/plugins/ezconf-listappplugin.js

YUI.add('ezconf-listapplugin', function (Y) {
    // Good practices:
    // * use a custom namespace. 'eZConf' is used as an example here.
    // * put the plugins in a 'Plugin' sub namespace
    Y.namespace('eZConf.Plugin');

    Y.eZConf.Plugin.ListAppPlugin = Y.Base.create('ezconfListAppPlugin', Y.Plugin.Base, [], {
        initializer: function () {
            var app = this.get('host'); // the plugged object is called host

            console.log("Hey, I'm a plugin for PlatformUI App!");
            console.log("And I'm plugged in ", app);
        },
    }, {
        NS: 'ezconfTypeApp' // don't forget that
    });

    // registering the plugin for the app
    // with that, the plugin is automatically instantiated and plugged in
    // 'platformuiApp' component.
    Y.eZ.PluginRegistry.registerPlugin(
        Y.eZConf.Plugin.ListAppPlugin, ['platformuiApp']
    );
});