code: private void logAction(String action, String onUrl, Renderer[] renderers) {
          if (LOG.isInfoEnabled()) {
              List<String> rendererNames = new ArrayList<>(renderers.length);
              for (Renderer renderer : renderers) {
                  rendererNames.add(renderer.getClass().getName());
              }
              LOG.info("{} provider={} page= {} renderers={}", action, this.config.getInstanceName(), onUrl,
                      rendererNames);
          }
      }
docs: Log current provider, page and renderers that will be applied.
  <p>
  This methods log at the INFO level.
  <p>
  You should only call this method if INFO level is enabled.
  
  <pre>
  if (LOG.isInfoEnabled()) {
  logAction(pageUrl, renderers);
  }
  </pre>
  
  @param action
  Action name (eg. "proxy" or "render")
  @param onUrl
  current page url.
  @param renderers
  array of renderers