docs: private HttpUriRequest buildApacheRequest(ClientRequest jerseyRequest) {
          final RequestBuilder builder = RequestBuilder
                  .create(jerseyRequest.getMethod())
                  .setUri(jerseyRequest.getUri())
                  .setEntity(getHttpEntity(jerseyRequest));
          for (String headerName : jerseyRequest.getHeaders().keySet()) {
              builder.addHeader(headerName, jerseyRequest.getHeaderString(headerName));
          }
  
          final Optional<RequestConfig> requestConfig = addJerseyRequestConfig(jerseyRequest);
          requestConfig.ifPresent(builder::setConfig);
  
          return builder.build();
      }