struct INetBaseSendable { };
INetwork.h
virtual ~INetBaseSendable();
void AddRef();
virtual size_t GetSize() = 0;
INetBaseSendable();
void Release();
virtual EMessageSendResult Send(INetSender * pSender) = 0;
Callback for when we know what happened to a packet
virtual void UpdateState(uint32 nFromSeq, ENetSendableStateUpdate update) = 0;