  FilterHeadersStatus decodeHeaders(RequestHeaderMap& headers, bool end_stream) {
    is_grpc_request_ = Grpc::Common::isGrpcRequestHeaders(headers);
    FilterHeadersStatus status = handle_->decodeHeaders(headers, end_stream);
    return status;
  }
  FilterHeadersStatus decodeHeaders(RequestHeaderMap& headers, bool end_stream) {
    is_grpc_request_ = Grpc::Common::isGrpcRequestHeaders(headers);
    FilterHeadersStatus status = handle_->decodeHeaders(headers, end_stream);
    return status;
  }