@Test
 public void deleteSetup_shouldWork() throws PersistenceException {
   store.deleteConnectorSetup("test", "42");
   ConnectorSetupBean setupBean =
       new ConnectorSetupBean("test", "42", new HashMap<String, String>());
   Mockito.verify(persistence).delete(Mockito.refEq(setupBean, "properties"));
 }
 @Test
 public void deleteSetupTwice_shouldIgnoreSecondCall() {
   store.deleteConnectorSetup("test", "42");
   store.deleteConnectorSetup("test", "42");
 }