/** Get the render types as a value holder collection. */
 private static ISelectableValueHolderCollection<String> getRenderTypesAsValueHolderCollection() {
   ISelectableValueHolderCollection<String> renderTypes =
       new DefaultSelectableValueHolderCollection<String>();
   for (RenderType renderType : RenderType.values()) {
     renderTypes.add(
         new DefaultSelectableValueHolder<String>(
             renderType.name(),
             Msg.get("object.kpi_value_definition.render_type." + renderType.name() + ".label")));
   }
   return renderTypes;
 }