struct MethodA {
    int a;
    Vector<String> b;

    void Serialize(Stream& s) { s % a % b; }
};

struct MethodB {
   ....
}

struct Server {
    void Do(MethodA& a);
    void Do(MethodB& b);
};

client:

Connection<Server> x;
....
MethodA a;
a.x = 123;
a.b.Add(123);
x.Do(a);

class RemotelyCallableClass
{
public:
	RCallback1<int> doSomething;
};

class ClientSide()
{
	RClient<RemotelyCallableClass> client; //some setup needed
	void doSomethingRemotely()
	{
		client.doSomething(33);
	}
};

class ServerSide()
{
public:
	ServerSide()
	{

		server.doSomething <<= THISBACK(OnDoSomething);
		//some setup (IP, port)
	}
	RServer<RemotelyCallableClass> server; 
	void OnDoSomething(int v)
	{
		//some processing on server
	}
};