useCache = SCOUtils.useContainerCache(ownerSM, fieldName);
if (!SCOUtils.collectionHasSerialisedElements(fmd) &&
fmd.getPersistenceModifier() == FieldPersistenceModifier.PERSISTENT)
{
ClassLoaderResolver clr = ec.getClassLoaderResolver();
this.backingStore = (SetStore)
((BackedSCOStoreManager)ec.getStoreManager()).getBackingStoreForField(clr,fmd,java.util.SortedSet.class);
}
// Set up our delegate, using a suitable comparator