Collated.For_testingval of_list :
num_filtered_rows:int ->
key_range:'k Collate_params.Which_range.t ->
rank_range:int Collate_params.Which_range.t ->
num_before_range:int ->
range_widened_by:(int * int) ->
num_unfiltered_rows:int ->
('k * 'v) list ->
('k, 'v) tCreate Collated.t of a list of data. Note: no collation or checks are performed, it will contain exactly the data you provided