Clockwork\Storage\Storage::retrieveAsJson PHP Method

    public function retrieveAsJson($id = null, $last = null)
    {
        $requests = $this->retrieve($id, $last);
        if (!$requests) {
            return null;
        }
        if (!is_array($requests)) {
            return $requests->toJson();
        }
        foreach ($requests as &$request) {
            $request = $request->toArray();
        }
        return json_encode($requests);
    }