private CacheClientProxy getCacheClientProxy() {
    return CacheClientNotifier.getInstance().getClientProxies().iterator().next();
  }
HARegionQueueThreadIdExpiryRegressionTest
<p>
TRAC #48879: Leaking ThreadIdentifiers and DispatchedAndCurrentEvents objects when client uses
many short lived threads
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HARegionQueueThreadIdExpiryRegressionTest.java