/* Reference counting only needs to be locked out against the transitions,
* 0->1 and 1->0 (i.e., when we do not own the reference we are getting).
* This only happens when finding the a node reference from the node table,
/* Reference counting only needs to be locked out against the transitions,
* 0->1 and 1->0 (i.e., when we do not own the reference we are getting).
* This only happens when finding the a node reference from the node table,