code: public void registerSynchronization(UOWCoordinator coord,
                                          Synchronization sync)
      throws RollbackException, IllegalStateException, SystemException
      {
          registerSynchronization(coord, sync, EmbeddableWebSphereTransactionManager.SYNC_TIER_NORMAL);
      }
docs: Method to register synchronization object with JTA tran via UOWCoordinator
  for improved performance.
  
  @param coord UOWCoordinator previously obtained from UOWCurrent.
  @param sync  Synchronization object to be registered.
  
  We should deprecate this now that UOWCoordinator is a javax...Transaction