code: @Override
      @SuppressWarnings("unused")
      public URLConnection openConnection(URL url) throws IOException {
          try {
              return (URLConnection) _openConnection.invoke(getInstance(), new Object[] { url });
          } catch (Exception e) {
              FFDCFilter.processException(e, getClass().getName(), "openConnection", url);
              return null;
          }
      }
docs: /*
  @see org.osgi.service.url.URLStreamHandlerService#openConnection(java.net.URL)