Read-only specification of the last collection element for key-set based paging.
The value is an implementation detail and must only be used for passing it directly
to getSoaCollectionPage() in order to navigate to the next collection page.
The value must be retrieved from the "lastKeySet" property of the previous getSoaCollectionPage() call.
To be left empty for the very first getSoaCollectionPage() call (default).
Enables usage of replicated data increasing the performance and stability of search operations.
Regardless of this setting live data will be used instead in case of replication having
a lag of more than a couple of seconds.