Irmin_pack_unix.UtilsSourceval nearest_leq :
arr:'a ->
get:('a -> int -> 'b) ->
lo:int ->
hi:int ->
key:'b ->
[> `All_gt_key | `Some of int ]nearest_leq ~arr ~get ~lo ~hi ~key returns the nearest entry in the sorted arr that is <= the given key. Routine is based on binary search.