22 std::tuple<ReadStream, uint32_t> readU32(ReadStream in) {  in readU32()  argument
23     volatile const uint32_t* pos = reinterpret_cast<volatile const uint32_t*>(in.pos());  in readU32()
24     in += sizeof(uint32_t);  in readU32()
25     if (!in) return {in, 0};  in readU32()
26     return {in, *pos};  in readU32()
29 std::tuple<ReadStream, Command> readCommand(ReadStream in) {  in readCommand()  argument
30     return readCmd<Command>(in);  in readCommand()
33 Command peakCommand(ReadStream in) {  in peakCommand()  argument
34     auto [_, cmd] = readCommand(in);  in peakCommand()
38 std::tuple<ReadStream, Protocol> readProtocol(ReadStream in) {  in readProtocol()  argument
39     return readCmd<Protocol, kProtoInvalid>(in);  in readProtocol()
42 Protocol peakProtocol(ReadStream in) {  in peakProtocol()  argument
43     auto [_, proto] = readProtocol(in);  in peakProtocol()