code: protected void renderColgroupsFacet(FacesContext facesContext, ResponseWriter writer, UIComponent component)
              throws IOException
      {
          UIComponent colgroupsFacet = component.getFacet("colgroups");
          if (colgroupsFacet == null)
          {
              // no facet to be rendered
              return;
          }
          // render the facet
          //RendererUtils.renderChild(facesContext, colgroupsFacet);
          colgroupsFacet.encodeAll(facesContext);
      }
docs: Renders the colgroups facet.
  @param facesContext the <code>FacesContext</code>.
  @param writer the <code>ResponseWriter</code>.
  @param component the parent <code>UIComponent</code> containing the facets.
  @throws IOException if an exception occurs.
  @since 2.0