private static HeapEvictor getEvictor(GemFireCacheImpl cache) {
    if (offHeap) {
      return cache.getOffHeapEvictor();
    } else {
      return cache.getHeapEvictor();
    }
  }
Test Case verifies:If naturally Eviction up and eviction Down events are raised. Centralized
and Inline eviction are happening. All this verification is done through logs. It also verifies
that during eviction, if one node goes down and then comes up again causing GII to take place,
the system does not throw an OOME.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/eviction/EvictionDUnitTest.java