 {  /**   * @var array Each array element in the return is an associative array with keys   * data, filename, contenttype, cid   * @access private   */  var $requestAttachments = array();  /**   * @var array Each array element in the return is an associative array with keys   * data, filename, contenttype, cid   * @access private   */  var $responseAttachments;  /**   * @var string   * @access private   */  var $mimeContentType;    /**  * adds a MIME attachment to the current re