diff -r f497cf8621b3 -r e8eb755f0099 samples/singletons/src/org/apidesign/singletons/impl/DefaultDialogDisplayer.java
--- a/samples/singletons/src/org/apidesign/singletons/impl/DefaultDialogDisplayer.java	Wed Jan 27 20:49:32 2010 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,16 +0,0 @@
-package org.apidesign.singletons.impl;
-
-import javax.swing.JOptionPane;
-import org.apidesign.singletons.api.DialogDisplayer;
-import org.openide.util.lookup.ServiceProvider;
-
-// BEGIN: singletons.injectable.implement
-@ServiceProvider(service=DialogDisplayer.class)
-public final class DefaultDialogDisplayer extends DialogDisplayer {
-    @Override
-    public boolean yesOrNo(String query) {
-        final int res = JOptionPane.showConfirmDialog(null, query);
-        return res == JOptionPane.OK_OPTION;
-    }
-}
-// END: singletons.injectable.implement