: pool_(symbol_table), streams_total_(pool_.add("streams_total")),

      google_grpc_client_creation_(pool_.add("google_grpc_client_creation")) {

  for (uint32_t i = 0; i <= Status::WellKnownGrpcStatus::MaximumKnown; ++i) {

    std::string status_str = absl::StrCat(i);

    streams_closed_[i] = pool_.add(absl::StrCat("streams_closed_", status_str));

    status_names_[status_str] = pool_.add(status_str);

  }

}