private void ReplyToConcealedGridsRequest(byte[] body, ulong senderId)
        {
            Log.Trace("Receiving Concealed Grids Request",
                "ReceiveConcealedGridsRequest");

            Log.Trace("Deserializing request", "ReceiveConcealedGridsRequest");
            // nothing to read, but doing this anyway to test
            ConcealedGridsRequest request = ConcealedGridsRequest.FromBytes(body);

            Log.Trace("Preparing response", "ReceiveConcealedGridsRequest");
            ConcealedGridsResponse response = new ConcealedGridsResponse {
                ConcealedGrids = Session.Manager.Concealed.ConcealedGridsList()
            };

            Log.Trace("Sending to player", "ReceiveConcealedGridsRequest");
            response.SendToPlayer(senderId);
        }