private OffHeapStoredObject allocateOffHeapStoredObject(int size) {
    OffHeapStoredObject result = freeList.allocate(size);
    int resultSize = result.getSize();
    stats.incObjects(1);
    stats.incUsedMemory(resultSize);
    stats.incFreeMemory(-resultSize);
    notifyListeners();
    if (ReferenceCountHelper.trackReferenceCounts()) {
      ReferenceCountHelper.refCountChanged(result.getAddress(), false, 1);
    }
    return result;
  }
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