code: func aclVersion(ch api.Channel) {
  	fmt.Println("ACL getting version")
  
  	req := &acl.ACLPluginGetVersion{}
  	reply := &acl.ACLPluginGetVersionReply{}
  
  	if err := ch.SendRequest(req).ReceiveReply(reply); err != nil {
  		fmt.Println("ERROR:", err)
  	} else {
  		fmt.Printf("ACL version reply: %+v\n", reply)
  	}
  }
docs: // aclVersion is the simplest API example - one empty request message and one reply message.