@Override
  public void close() {
    try {
      LifecycleListener.invokeBeforeClose(this);
    } finally {
      ooohml.close();
      if (Boolean.getBoolean(FREE_OFF_HEAP_MEMORY_PROPERTY)) {
        realClose();
      }
    }
  }
Returns a possibly empty list that contains all the Chunks used by regions.
geode-core/src/main/java/org/apache/geode/internal/offheap/MemoryAllocatorImpl.java