@Override
  public String toString() {
    return ace.getRecipient().toString();
  }
@Test
  public void testToString() {
    UIRepositoryObjectAcl uiAcl = new UIRepositoryObjectAcl( createObjectAce() );
    String s = uiAcl.toString();
    assertNotNull( s );
    assertTrue( s.contains( RECIPIENT1 ) );
  }