/**
     * Executes the given event
     *
     * @param string $event_name The name of the event to trigger
     * @param array $params The list of parameters to submit to the event handler
     * @return array The list of parameters that were submitted along with any modifications made to them
     *  by the event handlers.  In addition a __return__ item is included with the return array from the event.
     */
    protected function executeAndParseEvent($event_name, $params) {
        $eventFactory = $this->getFromContainer('util.events');
        $eventListener = $eventFactory->listener();
        $eventListener->register($event_name);
        $event = $eventListener->trigger(
            $eventFactory->event($event_name, $params)
        );

        $return = ['__return__' => $event->getReturnValue()];
        $event_params = $event->getParams();
        if (is_array($event_params)) {
            foreach ($event_params as $event_param => $data) {
                if (array_key_exists($event_param, $params)) {
                    $return[$event_param] = $data;
                }
            }
        }

        return $return;
    }