code: public Iterator<String> getRendererTypes(String componentFamily) {
  
          Set<String> empty = Collections.emptySet();
          return empty.iterator();
  
      }
docs: <p class="changed_added_2_0">Return an <code>Iterator</code> over
  the renderer-type entries for the given component-family.</p>
  
  <p class="changed_added_2_0">If the specified <code>componentFamily</code>
  is not known to this <code>RenderKit</code> implementation, return
  an empty <code>Iterator</code></p>
  
  <p class="changed_added_2_0">
  The default implementation of this method returns an empty
  <code>Iterator</code>
  </p>
  
  @param componentFamily one of the members of the
  <code>Iterator</code> returned by {@link #getComponentFamilies}.
  
  @since 2.0