@Override
      public void run() {
        try {
          try {
            Thread.sleep(500);
          } catch (InterruptedException e) {
            fail("sleep was interrupted");
          }
          doOpsLoop(false);
          long events = CCRegion.getCachePerfStats().getConflatedEventsCount();
          if (!CCRegion.getScope().isGlobal()) {
            assertThat(events > 0).describedAs("expected some event conflation").isTrue();
          }
        } catch (CacheException e) {
          fail("while performing concurrent operations", e);
        }
      }
Clear all existing transaction listeners and install the given listener.
geode-dunit/src/main/java/org/apache/geode/cache30/MultiVMRegionTestCase.java