@Released(OffHeapIdentifier.TEST_OFF_HEAP_REGION_BASE_LISTENER)
    @Override
    public void close() {
      if (ohOldValue instanceof OffHeapStoredObject) {
        ohOldValue.release();
      }
      if (ohNewValue instanceof OffHeapStoredObject) {
        ohNewValue.release();
      }
    }
This method retains both ohOldValue and ohNewValue
geode-core/src/integrationTest/java/org/apache/geode/internal/offheap/OffHeapRegionBase.java