SimpleEmailServiceMessage::setMessageFromString PHP Method

    public function setMessageFromString($text, $html = null)
    {
        $this->messagetext = $text;
        $this->messagehtml = $html;
        return $this;
    }

 public static function sendSESFromHtml($html, $to, $subject)
 {
     $tos = array();
     if (!empty($to)) {
         $array = explode(";", $to);
         if (!empty($array) && sizeof($array) > 0) {
             foreach ($array as $mail) {
                 if (!empty($mail)) {
                     array_push($tos, $mail);
                 } else {
                     error_log($mail . " not valid");
                 }
             }
         }
     }
     if (!empty($tos) && sizeof($tos) > 0) {
         $ses = new SimpleEmailService(AWS_SES_API_KEY, AWS_SES_API_SECRET);
         $ses->enableVerifyPeer(false);
         $m = new SimpleEmailServiceMessage();
         $m->setSubjectCharset("UTF-8");
         $m->setMessageCharset("UTF-8");
         foreach ($tos as $mail) {
             $m->addTo($mail);
         }
         $m->setFrom(AWS_SES_API_FROM);
         $m->setSubject($subject);
         $m->setMessageFromString(null, $html);
         return $ses->sendEmail($m);
     } else {
         error_log(LanguageUtils::getText("LANG_UTILS_MAIL_ERROR_EMAIL_EMPTY"));
     }
     return false;
 }