elasticsearch-js/docs/reference/api/RRFRetriever.md

Interface RRFRetriever

Name	Type	Description
rank_constant	integer	This value determines how much influence documents in individual result sets per query have over the final ranked result set.
rank_window_size	integer	This value determines the size of the individual result sets per query.
retrievers	RetrieverContainer[]	A list of child retrievers to specify which sets of returned top documents will have the RRF formula applied to them.