module RowDisplacement:sig..end
type'atable =int array * 'a array
val compress : ('a -> 'a -> bool) ->
       ('a -> bool) ->
       'a ->
       int ->
       int -> 'a array array -> 'a table
val get : 'a table -> int -> int -> 'a
val getget : ('displacement -> int -> int) ->
       ('data -> int -> 'a) -> 'displacement * 'data -> int -> int -> 'a