private void collectFreeTinyChunks(List<LongStack> l) {
    for (int i = 0; i < tinyFreeLists.length(); i++) {
      OffHeapStoredObjectAddressStack cl = tinyFreeLists.get(i);
      if (cl != null) {
        long head = cl.clear();
        if (head != 0L) {
          l.add(new OffHeapStoredObjectAddressStack(head));
        }
      }
    }
  }
Unit tests override this method to get better test coverage
geode-core/src/main/java/org/apache/geode/internal/offheap/FreeListManager.java