--test_boundary
Content-Type: application/http
Content-ID: response-1

HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Vary: Origin
Vary: X-Origin
Vary: Referer

{
  "name": "projects/test-project/messages/1"
}

--test_boundary
Content-Type: application/http
Content-ID: response-2

HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Vary: Origin
Vary: X-Origin
Vary: Referer

{
  "name": "projects/test-project/messages/2"
}

--test_boundary--