public function LoadBlocked($statuses, $search = null, $limit = 0, $offset = 0) {
        return $this->sendRequest('contact/loadblocked', array(
                    'statuses' => (count($statuses) === 0) ? null : join(';', $statuses),
                    'search' => $search,
                    'limit' => $limit,
                    'offset' => $offset
        ));
    }