22   /** @var string Multipart Boundary. */
23   private $boundary;  variable in Google_BatchRequest
28   public function __construct($boundary = false) {  argument
29     $boundary = (false == $boundary) ? mt_rand() : $boundary;
30     $this->boundary = str_replace('"', '', $boundary);
46       $body .= "--{$this->boundary}\n";
51     $body .= "\n--{$this->boundary}--";
57         'Content-Type' => 'multipart/mixed; boundary=' . $this->boundary));
69     $boundary = false;
72       if (isset($part[0]) && 'boundary' == trim($part[0])) {
73         $boundary = $part[1];
79       $body = str_replace("--$boundary--", "--$boundary", $body);
80       $parts = explode("--$boundary", $body);