code: public Iterator<String> getComponentFamilies()
      {
          List<String> emptyList = Collections.emptyList();
  
          return emptyList.iterator();
      }
docs: <p>
  Return an <code>Iterator</code> over the component-family entries supported by this <code>RenderKit</code>
  instance.
  </p>
  
  <p>
  The default implementation of this method returns an empty <code>Iterator</code>
  </p>
  
  @return an iterator over the component families supported by this <code>RenderKit</code>.
  
  @since 2.0