void SendMethodSession(string methodName, WebSocketData.SessionParameter parameter)
 {
     WebSocketData.MethodSession method = new WebSocketData.MethodSession();
     method.method  = methodName;
     method.@params = parameter;
     Debug.Log("method" + JsonUtility.ToJson(method));
     ws.Send(JsonUtility.ToJson(method));
 }
 void CreateSession(string cortexToken)
 {
     WebSocketData.SessionParameter p = new WebSocketData.SessionParameter();
     p.cortexToken = cortexToken;
     p.status      = "open";
     p.headset     = "INSIGHT-A1D205CF";
     Debug.Log("Create session with cortexToken: " + cortexToken);
     SendMethodSession("createSession", p);
 }