Owl_countmin_sketch.Owl
type 'a sketch = 'a Make(Owl_countmin_table.Owl).sketch
val init : epsilon:float -> delta:float -> 'a sketch
val incr : 'a sketch -> 'a -> unit
val count : 'a sketch -> 'a -> int
val init_from : 'a sketch -> 'a sketch
val merge : 'a sketch -> 'a sketch -> 'a sketch