btn.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
if ( Window.confirm( Constants.INSTANCE.SnapshotDeleteConfirm( snapshotName,
moduleName ) ) ) {
ModuleServiceAsync moduleService = GWT.create(ModuleService.class);
moduleService.copyOrRemoveSnapshot( moduleName,
snapshotName,
true,
null,
new GenericCallback<java.lang.Void>() {
public void onSuccess(Void v) {