code: func NewAsynchClientWithSpec(spec *ConnectionSpec) (client AsyncClient, err Error) {
  	c := new(asyncClient)
  	c.conn, err = NewAsynchConnection(spec)
  	if err != nil {
  		if debug() {
  			log.Println("NewAsyncConnection() raised error: ", err)
  		}
  		return nil, err
  	}
  	return c, nil
  }
docs: // Create a new asynClient and connects to the Redis server using the
  // specified ConnectionSpec.
  //