reactivemongo.api.commands.AggregationFramework
(collStats: StringAdd).self
(collStats: StringFormat).self
(collStats: ArrowAssoc[CollStats]).x
(Since version 2.10.0) Use leftOfArrow
instead
(collStats: Ensuring[CollStats]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
$collStats aggregation stage.