code: public static void processWebhookNotification(
        HttpServletRequest req, HttpServletResponse resp, DataStoreFactory dataStoreFactory)
        throws ServletException, IOException {
      processWebhookNotification(req, resp, StoredChannel.getDefaultDataStore(dataStoreFactory));
    }
docs: Utility method to process the webhook notification from {@link HttpServlet#doPost} by finding
  the notification channel in the given data store factory.
  
  <p>
  It is a wrapper around
  {@link #processWebhookNotification(HttpServletRequest, HttpServletResponse, DataStore)} that
  uses the data store from {@link StoredChannel#getDefaultDataStore(DataStoreFactory)}.
  </p>
  
  @param req an {@link HttpServletRequest} object that contains the request the client has made
  of the servlet
  @param resp an {@link HttpServletResponse} object that contains the response the servlet sends
  to the client
  @param dataStoreFactory data store factory
  @exception IOException if an input or output error is detected when the servlet handles the
  request
  @exception ServletException if the request for the POST could not be handled