private static bool OnLogon(int sessionID, ByteArray byteArray, IPokemonBattleServerService serverService)
        {
            string     identity    = byteArray.ReadUTF();
            BattleMode modeInfo    = BattleModeHelper.ReadFromByteArray(byteArray);
            string     versionInfo = byteArray.ReadUTF();

            serverService.OnLogon(sessionID, identity, modeInfo, versionInfo);
            return(true);
        }