operator <<(std::ostream &os, const ConnStateData::ServerConnectionContext &scc)
{
    return os << scc.conn_ << ", srv_bytes=" << scc.preReadServerBytes.length();
}
operator <<(std::ostream &os, const ConnStateData::ServerConnectionContext &scc)
{
    return os << scc.conn_ << ", srv_bytes=" << scc.preReadServerBytes.length();
}