== Revisions and changes ==
The revisionId is a UUID and it can be used to retrieve the delta between a particular revisionId and the current one. This operation is done using |Promise<DataStoreChanges> getChangessync(DOMString revisionId);|. Note that the object DataStoreChanges contains only useful operations: for example, the ID of record that has been updated and removed only shows up in the |removedIds| array.
== Examples ==