code: func InstallHandlers(r *router.Router, base router.MiddlewareChain) {
  	if appengine.IsDevAppServer() {
  		r.GET(pubSubPullURLPath, base, pubSubPull)
  	}
  	r.POST(pubSubPushURLPath, base, pubSubPush)
  }
docs: // InstallHandlers installs PubSub related HTTP handlers.