assertTrue(cm.containsRemotingSession("sessionid3"));
assertTrue(cm.containsRemotingSession("sessionid4"));
assertTrue(cm.containsRemotingSession("sessionid5"));
assertTrue(cm.containsRemotingSession("sessionid6"));
ConnectionEndpoint r1 = cm.unregisterConnection("jvm3", "sessionid6");
assertEquals(e6, r1);
assertFalse(e6.isClosed());
assertNull(cm.unregisterConnection("blah", "blah"));