Google App Engine：将远程API与本地GAE Dev服务器一起使用

I have a non-GAE backend that's using the Remote API to access datastore. The only way to do this (without a proxy GAE service) is to use the GAE Remote API.

This works fine when connecting the Remote Context to a GAE production deployment, but what about GAE dev server?

I want to be able to test my changes locally before deploying anything. Is there a way to connect the remote API to a local GAE dev server datastore?

Relevant sample code:

func getRemoteCtx(ctx context.Context, r *http.Request) (context.Context, error) {
    ts, err := google.DefaultTokenSource(ctx,
        "https://www.googleapis.com/auth/appengine.apis",
        "https://www.googleapis.com/auth/userinfo.email",
        "https://www.googleapis.com/auth/cloud-platform",
    )
    if err != nil {
        log.Fatal(err)
    }
    hc := oauth2.NewClient(ctx, ts)

    host := "myapp.appspot.com"

    log.Printf("create remote context with host: %s", host)
    return remote_api.NewRemoteContext(host, hc)
}

Check out the host. Is there a way to set this to a local GAE dev server?