docs: public void clearLockSuspending() {
        Transaction tx = null;
        try {
           // if there is an ongoing transaction we need to suspend it
           if ((tx = tm.getTransaction()) != null) {
              tm.suspend();
           }
           clearLock();
        }
        catch (Exception e) {
           log.errorSuspendingTransaction(e);
        }
        finally {
           if (tx != null) {
              try {
                 tm.resume(tx);
              } catch (Exception e) {
                 throw new CacheException("Unable to resume suspended transaction " + tx, e);
              }
           }
        }
     }