Synchronous, read-only view of the persisted refcounting state.
fjall offers synchronous reads, so reads can go straight to the backing
store. All writes go through ValueRefsUpdate batches instead, since
persistent backends can only write asynchronously (fjall inserts + persist).
Synchronous, read-only view of the persisted refcounting state.
fjall offers synchronous reads, so reads can go straight to the backing store. All writes go through
ValueRefsUpdatebatches instead, since persistent backends can only write asynchronously (fjall inserts + persist).