controls

var NewPipe = func(c PipeClient, appID string) (string, xfer.Pipe, error) {
	pipeID := fmt.Sprintf("pipe-%d", rand.Int63())
	pipe := &pipe{
		Pipe:   xfer.NewPipe(),
		appID:  appID,
		id:     pipeID,
		client: c,
	}
	if err := c.PipeConnection(appID, pipeID, pipe.Pipe); err != nil {
		return "", nil, err
	}
	return pipeID, pipe, nil
}