private void expandCategory(String category) {
   if (category != null) {
     ISiteCategoryDefinition[] catDefs = fModel.getSite().getCategoryDefinitions();
     for (int i = 0; i < catDefs.length; i++) {
       if (category.equals(catDefs[i].getName())) {
         fCategoryViewer.expandToLevel(catDefs[i], 1);
         break;
       }
     }
   }
 }