@NotNull
  public RegionEntry put(@NotNull final Object key) throws RegionClearedException {
    final RegionEntry regionEntry = getOrCreateRegionEntry(key);
    regionEntry.setValue(null, key);
    return regionEntry;
  }
Artificial work load of fetching a value from the cache, doing some work and replacing the
entry.
geode-core/src/jmh/java/org/apache/geode/internal/util/concurrent/ConcurrentHashMapObjectBenchmark.java