code: void checkAllLocks() throws BackendException {
          StoreTransaction lt = getConsistentTx();
          for (ExpectedValueCheckingStore store : expectedValuesByStore.keySet()) {
              Locker locker = store.getLocker();
              // Ignore locks on stores without a locker
              if (null == locker)
                  continue;
              locker.checkLocks(lt);
          }
      }
docs: Check all locks attempted by earlier
  {@link KeyColumnValueStore#acquireLock(StaticBuffer, StaticBuffer, StaticBuffer, StoreTransaction)}
  calls using this transaction.
  
  @throws com.thinkaurelius.titan.diskstorage.BackendException