.  *  * @param string $soapmsg The SOAP payload  * @return string The HTTP body, which includes the SOAP payload  * @access private  */  function getHTTPBody($soapmsg) {   if (count($this->responseAttachments) > 0) {    $params['content_type'] = 'multipart/related; type="text/xml"';    $mimeMessage = new Mail_mimePart('', $params);    unset($params);     $params['content_type'] = 'text/xml';    $params['encoding']     = '0bit';    $params['charset']      = $this->soap_defencoding;    $mimeMessage->addSubpart($soapmsg, $params);        foreach ($this->re