Method write

flow/include/flow/serialize.h:333–336

	explicit _IncludeVersion(ProtocolVersion defaultVersion) : v(defaultVersion) { ASSERT(defaultVersion.isValid()); }
	template <class Ar>
	void write(Ar& ar) {
		ar.setProtocolVersion(v);
		ar << v;
	}
	template <class Ar>
	void read(Ar& ar) {
		ar >> v;