public function registerGroup()
    {
        $app = $this->app;

        $app->bind('Stevemo\Cpanel\Group\Repo\CpanelGroupInterface', function($app)
        {
            return new GroupRepository($app['sentry'], $app['events']);
        });

        $app->bind('Stevemo\Cpanel\Group\Form\GroupFormInterface', function($app)
        {
            return new GroupForm(
                new GroupValidator($app['validator'], new MessageBag),
                $app->make('Stevemo\Cpanel\Group\Repo\CpanelGroupInterface')
            );
        });
    }