reactivemongo.api.commands.AggregationFramework
Performs $facet stage, to process multiple aggregation pipelines within a single stage on the same set of input documents.
Each sub-pipeline has its own field in the output document where its results are stored as an array of documents.
the subpipelines to run
Performs $facet stage, to process multiple aggregation pipelines within a single stage on the same set of input documents.
Each sub-pipeline has its own field in the output document where its results are stored as an array of documents.