code: public static HttpHeaders toArmeria(io.netty.handler.codec.http.HttpHeaders inHeaders) {
          if (inHeaders.isEmpty()) {
              return HttpHeaders.EMPTY_HEADERS;
          }
  
          final HttpHeaders out = new DefaultHttpHeaders(true, inHeaders.size());
          toArmeria(inHeaders, out);
          return out;
      }
docs: Converts the specified Netty HTTP/1 headers into Armeria HTTP/2 headers.