internal static void HandleNetworkVariableDelta(ulong clientId, Stream stream, Action <ulong, PreBufferPreset> bufferCallback, PreBufferPreset bufferPreset)
        {
#if DEVELOPMENT_BUILD || UNITY_EDITOR
            s_HandleNetworkVariableDelta.Begin();
#endif
            if (!NetworkManager.Singleton.NetworkConfig.EnableNetworkVariable)
            {
                if (NetworkLog.CurrentLogLevel <= LogLevel.Normal)
                {
                    NetworkLog.LogWarning($"{nameof(NetworkConstants.NETWORK_VARIABLE_DELTA)} received but {nameof(NetworkConfig.EnableNetworkVariable)} is false");
                }

                return;
            }

            using (var reader = PooledNetworkReader.Get(stream))
            {
                ulong  networkObjectId       = reader.ReadUInt64Packed();
                ushort networkBehaviourIndex = reader.ReadUInt16Packed();

                if (NetworkSpawnManager.SpawnedObjects.ContainsKey(networkObjectId))
                {
                    NetworkBehaviour instance = NetworkSpawnManager.SpawnedObjects[networkObjectId].GetNetworkBehaviourAtOrderIndex(networkBehaviourIndex);

                    if (instance == null)
                    {
                        if (NetworkLog.CurrentLogLevel <= LogLevel.Normal)
                        {
                            NetworkLog.LogWarning($"{nameof(NetworkConstants.NETWORK_VARIABLE_DELTA)} message received for a non-existent behaviour. {nameof(networkObjectId)}: {networkObjectId}, {nameof(networkBehaviourIndex)}: {networkBehaviourIndex}");
                        }
                    }
                    else
                    {
                        NetworkBehaviour.HandleNetworkVariableDeltas(instance.NetworkVariableFields, stream, clientId, instance);
                    }
                }
                else if (NetworkManager.Singleton.IsServer || !NetworkManager.Singleton.NetworkConfig.EnableMessageBuffering)
                {
                    if (NetworkLog.CurrentLogLevel <= LogLevel.Normal)
                    {
                        NetworkLog.LogWarning($"{nameof(NetworkConstants.NETWORK_VARIABLE_DELTA)} message received for a non-existent object with {nameof(networkObjectId)}: {networkObjectId}. This delta was lost.");
                    }
                }
                else
                {
                    if (NetworkLog.CurrentLogLevel <= LogLevel.Normal)
                    {
                        NetworkLog.LogWarning($"{nameof(NetworkConstants.NETWORK_VARIABLE_DELTA)} message received for a non-existent object with {nameof(networkObjectId)}: {networkObjectId}. This delta will be buffered and might be recovered.");
                    }

                    bufferCallback(networkObjectId, bufferPreset);
                }
            }
#if DEVELOPMENT_BUILD || UNITY_EDITOR
            s_HandleNetworkVariableDelta.End();
#endif
        }