protected void handleAdd() {
    ElementListSelectionDialog dialog =
        new ElementListSelectionDialog(getShell(), new StyledBundleLabelProvider(false, false));

    try {
      dialog.setElements(getValidBundles());
    } catch (CoreException e) {
      dialog.setMessage(e.getMessage());
    }

    dialog.setTitle(PDEUIMessages.PluginSelectionDialog_title);
    dialog.setMessage(PDEUIMessages.PluginSelectionDialog_message);
    dialog.setMultipleSelection(true);
    if (dialog.open() == Window.OK) {

      Object[] models = dialog.getResult();
      ArrayList<NameVersionDescriptor> pluginsToAdd = new ArrayList<NameVersionDescriptor>();
      for (int i = 0; i < models.length; i++) {
        BundleInfo desc = ((BundleInfo) models[i]);
        pluginsToAdd.add(new NameVersionDescriptor(desc.getSymbolicName(), null));
      }
      Set<NameVersionDescriptor> allDependencies = new HashSet<NameVersionDescriptor>();
      allDependencies.addAll(pluginsToAdd);
      NameVersionDescriptor[] currentBundles = getTargetDefinition().getImplicitDependencies();
      if (currentBundles != null) {
        allDependencies.addAll(Arrays.asList(currentBundles));
      }
      getTargetDefinition()
          .setImplicitDependencies(
              allDependencies.toArray(new NameVersionDescriptor[allDependencies.size()]));
      fElementViewer.refresh();
      updateImpButtons();
    }
  }
 private void doAdd(List<Object> items) {
   fImportListViewer.add(items.toArray());
   fAvailableListViewer.remove(items.toArray());
   fSelected.addAll(items);
 }