treeViewer.setLabelProvider(new AnnotationStylingLabelProvider(editor));
treeViewer.setInput(editor.getDocument().getCAS().getTypeSystem());
getSite().setSelectionProvider(treeViewer);
changeListener = new IAnnotationStyleListener() {
public void annotationStylesChanged(Collection<AnnotationStyle> styles) {
// Update all changed style elements in the table