public function onAfterRouteSite()
    {
        $app = JFactory::getApplication();
        if (!$app->isSite()) 
        {
            return;
        }
        
        // Make sure Gantry has been loaded (and theme is active).
        if (!class_exists('Gantry\Framework\Gantry'))
        {
            return;
        }
        
        // TODO: Add logic to set the custom outline. 
        // NOTE: Just remember not to set outline if you want to use regular template style assignments.
        $outline = null;
        if (1) 
        {
            $outline = 'default';
        }
        elseif (0)
        {
            $outline = 'foobar';
        }

        // If custom outline is set, use it!
        if (isset($outline)) 
        {
            $gantry = Gantry\Framework\Gantry::instance();
            $theme = $gantry['theme'];
            $theme->setLayout($outline);
        }
    }