code: public void updateDataOnly(Transaction tran, ObjectStore store) throws PersistenceException, ObjectManagerException, SevereMessageStoreException
      {
          updateDataOnly(tran, store, this);
      }
docs: Only update the persistent copy of the binary data held within this Persistable.
  
  @param tran The ObjectManager transaction under which the update of the data is carried out.
  
  @exception ObjectManagerException
  @throws SevereMessageStoreException