private void createImpTable(Composite container) {
   fElementViewer = new TableViewer(container, SWT.MULTI | SWT.V_SCROLL | SWT.BORDER);
   GridData gd = new GridData(GridData.FILL_BOTH);
   gd.heightHint = 250;
   fElementViewer.getControl().setLayoutData(gd);
   fElementViewer.getControl().setFont(container.getFont());
   fElementViewer.setContentProvider(
       new DefaultTableProvider() {
         public Object[] getElements(Object inputElement) {
           ITargetDefinition target = getTargetDefinition();
           if (target != null) {
             NameVersionDescriptor[] bundles = target.getImplicitDependencies();
             if (bundles != null) {
               return bundles;
             }
           }
           return new NameVersionDescriptor[0];
         }
       });
   fElementViewer.setLabelProvider(new StyledBundleLabelProvider(false, false));
   fElementViewer.setInput(PDEPlugin.getDefault());
   fElementViewer.setComparator(
       new ViewerComparator() {
         public int compare(Viewer viewer, Object e1, Object e2) {
           NameVersionDescriptor bundle1 = (NameVersionDescriptor) e1;
           NameVersionDescriptor bundle2 = (NameVersionDescriptor) e2;
           return super.compare(viewer, bundle1.getId(), bundle2.getId());
         }
       });
   fElementViewer.addSelectionChangedListener(
       new ISelectionChangedListener() {
         public void selectionChanged(SelectionChangedEvent event) {
           updateImpButtons();
         }
       });
   fElementViewer
       .getTable()
       .addKeyListener(
           new KeyAdapter() {
             public void keyPressed(KeyEvent e) {
               if (e.character == SWT.DEL && e.stateMask == 0) {
                 handleRemove();
               }
             }
           });
 }
 private void updateImpButtons() {
   boolean empty = fElementViewer.getSelection().isEmpty();
   fRemoveButton.setEnabled(!empty);
   boolean hasElements = fElementViewer.getTable().getItemCount() > 0;
   fRemoveAllButton.setEnabled(hasElements);
 }