private void handleError(JsonObject message)
{
long code = (long)message[ProtocolConstants.ERR_CODE_FIELD];
String reason = (String)message[ProtocolConstants.REASON_FIELD];
// The server is sending an error to the client.
// Possible errors include:
// BAD_SUBSCRIBER_ID a subscription ID is null or does not start
// with the client ID
// SEND_DISALLOWED sending is disabled for this user
listener.OnError(this, Convert.ToInt32(code), reason);
}