@Override
      public void customizeCellRenderer(SimpleColoredComponent renderer,
                                        JTree tree,
                                        Object value,
                                        boolean selected,
                                        boolean expanded,
                                        boolean leaf,
                                        int row,
                                        boolean hasFocus) {
        renderer.setIcon(getIcon(kind));
        renderer.setFont(tree.getFont());
        renderer.append(NewErrorTreeRenderer.calcPrefix(NotificationMessageElement.this));
      }
@Override
      public void customizeCellRenderer(SimpleColoredComponent renderer,
                                        JTree tree,
                                        Object value,
                                        boolean selected,
                                        boolean expanded,
                                        boolean leaf,
                                        int row,
                                        boolean hasFocus)