protected ThreadLocal<TransactionManager> tmTL = new ThreadLocal<TransactionManager>();
protected ThreadLocal<TreeCache> treeCacheTL = new ThreadLocal<TreeCache>();
protected void checkLocks() {
Cache<Object, Object> cache = cacheTL.get();
LockManager lm = TestingUtil.extractLockManager(cache);
assert !TreeStructureSupport.isLocked(lm, A);
assert !TreeStructureSupport.isLocked(lm, Fqn.ROOT);
assert TreeStructureSupport.isLocked(lm, C);
assert TreeStructureSupport.isLocked(lm, A_B);
assert TreeStructureSupport.isLocked(lm, A_B_C);