  Http::CodecClientPtr createCodecClient(Upstream::Host::CreateConnectionData& conn_data) override {
    auto codec_client = createCodecClient_(conn_data);
    return Http::CodecClientPtr(codec_client);
  };
  Http::CodecClientPtr createCodecClient(Upstream::Host::CreateConnectionData& conn_data) override {
    auto codec_client = createCodecClient_(conn_data);
    return Http::CodecClientPtr(codec_client);
  };