keys

The keys property contains the primary keys that changed, keyed by table name, for the tables whose complete set is known.

ChangedKeys

Use it to refresh individual rows instead of re-reading a whole table. A table listed in tables but absent here changed more rows than the bound of 1,000 keys per table allows an event to name, or changed across a handover; re-query that table instead. It is always empty when reset is true.