tree=new Tree<NavigableModel<Integer>, String>(treeStore, new ValueProvider<NavigableModel<Integer>, String>() {
            public String getValue(NavigableModel<Integer> _model) {
                TreeNode<NavigableModel<Integer>> treeNode=tree.findNode(_model);
                StringBuilder sb=new StringBuilder();
                if (!_model.getActive()) {
                    // All elements return null
                    XElement elem=tree.getView().getElement(treeNode);
                    if(elem!=null) {
                        elem.getStyle().setColor("red");
                    }
//                  treeNode.getElement().getStyle().setColor("red");
//                  treeNode.getTextElement().getStyle().setColor("red");
//                  sb.appendHtmlConstant("<span class="item-deleted">");
                }

                sb.append(_model.get("name"));
                if (idsCheckBox.getValue()) {
                    sb.append(" ("+_model.get("id")+")");
                }

//              if (!_model.getActive()) {
//                  sb.appendHtmlConstant("</span>");
//              }

                return(sb.toString());
            }
            public String getPath() {
                return("name");
            }
            public void setValue(NavigableModel<Integer> object, String value) {
            }
        });