  Http::FilterHeadersStatus decodeHeaders(Http::RequestHeaderMap&, bool) override {
    decoder_callbacks_->streamInfo().setResponseFlag(StreamInfo::ResponseFlag::NoFilterConfigFound);
    decoder_callbacks_->sendLocalReply(Http::Code::InternalServerError, EMPTY_STRING, nullptr,
                                       absl::nullopt, EMPTY_STRING);
    return Http::FilterHeadersStatus::StopIteration;
  }
  Http::FilterHeadersStatus decodeHeaders(Http::RequestHeaderMap&, bool) override {
    decoder_callbacks_->streamInfo().setResponseFlag(StreamInfo::ResponseFlag::NoFilterConfigFound);
    decoder_callbacks_->sendLocalReply(Http::Code::InternalServerError, EMPTY_STRING, nullptr,
                                       absl::nullopt, EMPTY_STRING);
    return Http::FilterHeadersStatus::StopIteration;
  }