private static boolean containsMatching(List<MTrimElement> children, MTrimElement me) {
   for (MTrimElement element : children) {
     if (Util.equals(me.getElementId(), element.getElementId())
         && element.getClass().isInstance(me)
         && (element instanceof MToolBarSeparator || element instanceof MToolBar)) {
       return true;
     }
   }
   return false;
 }