This is ready for another look-over. Here's the gist:
Writing deletions: starting at osm.del(), the deletion values are threaded through into _getDocumentDeletionBatchOp(), which generates a new batch op structure to be passed into osm.batch(), which in turn get fed into kv.batch().
Exposing values on deletions: look in osm.get() and addDocFromNode() in _collectNodeAndReferers().
This is ready for another look-over. Here's the gist:
osm.del(), the deletion values are threaded through into_getDocumentDeletionBatchOp(), which generates a new batch op structure to be passed intoosm.batch(), which in turn get fed intokv.batch().osm.get()andaddDocFromNode()in_collectNodeAndReferers().