public void treeExpanded(TreeEvent event) {
treeChanged();
}
};
treeViewer = new TableTreeViewer(tree);
treeViewer.setLabelProvider(new RuleTreeLabelProvider());
treeViewer.setContentProvider(contentProvider);
new DiagnosticsToolTipper(new TableItemContainer(table),
new DiagnosticsToolTipper.ItemMapper() {