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> import java.util.Collection;
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>     /** Delete behaviour customizer */
>     private static DeleteHandler deleteHandler = null;
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>     /**
>      * Gets a delete handler.
>      */
>     private static DeleteHandler getDeleteHandler() {
>         if (deleteHandler == null) {
>             org.openide.util.Lookup.Template template = new org.openide.util.Lookup.Template(DeleteHandler.class);
>             Collection deletes = org.openide.util.Lookup.getDefault().lookup(template).allInstances();
>             if (deletes.size() == 1) {
>                 deleteHandler = (DeleteHandler)deletes.iterator().next();
>             } else {
>                 deleteHandler = new StandardDelete();                
>             }
>         }
>         return deleteHandler;
>     }
>     
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< 
<     /** Class which performs delete action */
<     private class DeleteActionPerformer extends AbstractAction implements ActionPerformer {
---
>     
>     // Basic delete handler that provides a confirmation dialog and that
>     // uses Node.destroy() to perform deletes.
>     private static class StandardDelete implements DeleteHandler {
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<         DeleteActionPerformer() {}
<         
<         public boolean isEnabled() {
<             updateActionsState();
<             return super.isEnabled();
<         }
<         
<         /** Perform delete action. */
<         public void performAction(org.openide.util.actions.SystemAction action) {
<             final Node[] sel = manager.getSelectedNodes ();
<             if ((sel == null) || (sel.length == 0))
<                 return;
< 
<             // perform action if confirmed
<             if (!confirmDelete || doConfirm(sel)) {
< 
<                 // clear selected nodes
<                 try {
<                     if (manager != null) {
<                         manager.setSelectedNodes(new Node[] {});
<                     }
<                 } catch (java.beans.PropertyVetoException e) {
<                     // never thrown, setting empty selected nodes cannot be vetoed
<                 }
<                 
<                 doDestroy(sel);
<                 
<                 if (attachPerformers) {
<                     delete.setActionPerformer (null); // fixes bug #673
<                 } else {
<                     setEnabled (false);
<                 }
<             }
<         }
<         
<         private boolean doConfirm(Node[] sel) {
---
>         public boolean confirmDelete(Node[] sel) {
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>         
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<         private void doDestroy(final Node[] sel) {
---
>         public void performDelete(final Node[] sel) {
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>     }
> 
>     /** Class which performs delete action */
>     private class DeleteActionPerformer extends AbstractAction implements ActionPerformer {
>         
>         DeleteActionPerformer() {}
>         
>         public boolean isEnabled() {
>             updateActionsState();
>             return super.isEnabled();
>         }
>         
>         /** Perform delete action. */
>         public void performAction(org.openide.util.actions.SystemAction action) {
>             final Node[] sel = manager.getSelectedNodes ();
>             if ((sel == null) || (sel.length == 0))
>                 return;
> 
>             // perform action if confirmed
>             if (!confirmDelete || doConfirm(sel)) {
> 
>                 // clear selected nodes
>                 try {
>                     if (manager != null) {
>                         manager.setSelectedNodes(new Node[] {});
>                     }
>                 } catch (java.beans.PropertyVetoException e) {
>                     // never thrown, setting empty selected nodes cannot be vetoed
>                 }
>                 
>                 doDestroy(sel);
>                 
>                 if (attachPerformers) {
>                     delete.setActionPerformer (null); // fixes bug #673
>                 } else {
>                     setEnabled (false);
>                 }
>             }
>         }
>         
>         
>         private boolean doConfirm(Node[] sel) {
>             return getDeleteHandler().confirmDelete(sel);
>         }
>         
>         private void doDestroy(final Node[] sel) {
>             getDeleteHandler().performDelete(sel);
>         }
>