public function getContactsSuppressedSinceDate(
        $dateString,
        $select = 1000,
        $skip = 0
    ) {
        $url = $this->getApiEndpoint() . self::REST_CONTACTS_SUPPRESSED_SINCE
            . $dateString . '?select=' . $select . '&skip=' . $skip;
        $this->setUrl($url)
            ->setVerb('GET');

        $response = $this->execute();

        if (isset($response->message)) {
            $message = 'GET CONTACTS SUPPRESSED SINSE : ' . $dateString
                . ' select ' . $select . ' skip : ' . $skip . '   response : '
                . $response->message;
            $this->helper->debug('getContactsSuppressedSinceDate', [$message]);
        }

        return $response;
    }