private void initialize() {
    if (fWorkingSet != null) {
      HashSet<String> set = new HashSet<String>();
      IAdaptable[] elements = fWorkingSet.getElements();
      for (int i = 0; i < elements.length; i++) {
        if (elements[i] instanceof PersistablePluginObject)
          set.add(((PersistablePluginObject) elements[i]).getPluginID());
      }

      IPluginModelBase[] bases = PluginRegistry.getAllModels();
      for (int i = 0; i < bases.length; i++) {

        String id = bases[i].getPluginBase().getId();
        if (id == null) continue;
        if (set.contains(id)) {
          fTree.getCheckboxTreeViewer().setChecked(bases[i], true);
          set.remove(id);
        }
        if (set.isEmpty()) break;
      }
      fWorkingSetName.setText(fWorkingSet.getName());
    }
  }
 public Object[] getElements(Object inputElement) {
   return PluginRegistry.getAllModels();
 }