Map<K, V> getEventsMap() {
      assertThat(eventsMap).isNotNull();
      return eventsMap;
    }
Validate whether all the attributes set on AsyncEventQueueFactory are set on the sender
underneath the AsyncEventQueue.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/wan/asyncqueue/SerialEventListenerDistributedTest.java