code: protected void renderColumnFooterCell(FacesContext facesContext, ResponseWriter writer, UIColumn uiColumn,
          String footerStyleClass, int colspan) throws IOException
      {
        renderColumnFooterCell(facesContext, writer, uiColumn, uiColumn.getFooter(), footerStyleClass, colspan);
      }
docs: Renders the footer facet for the given <code>UIColumn</code>.
  @param facesContext the <code>FacesContext</code>.
  @param writer the <code>ResponseWriter</code>.
  @param uiColumn the <code>UIComponent</code>.
  @param footerStyleClass the styleClass of the footer facet.
  @param colspan the colspan for the tableData element in which the footer facet
  will be wrapped.
  @throws IOException