Batteries user guide : BatHashtbl.S.Labels

`sig
val add : 'a BatHashtbl.S.t -> key:BatHashtbl.S.key -> data:'a -> unit
val replace : 'a BatHashtbl.S.t -> key:BatHashtbl.S.key -> data:'a -> unit
val iter :
f:(key:BatHashtbl.S.key -> data:'a -> unit) -> 'a BatHashtbl.S.t -> unit
val map :
f:(key:BatHashtbl.S.key -> data:'a -> 'b) ->
'a BatHashtbl.S.t -> 'b BatHashtbl.S.t
val map_inplace :
f:(key:BatHashtbl.S.key -> data:'a -> 'a) -> 'a BatHashtbl.S.t -> unit
val filter : f:('a -> bool) -> 'a BatHashtbl.S.t -> 'a BatHashtbl.S.t
val filter_inplace : f:('a -> bool) -> 'a BatHashtbl.S.t -> unit
val filteri :
f:(key:BatHashtbl.S.key -> data:'a -> bool) ->
'a BatHashtbl.S.t -> 'a BatHashtbl.S.t
val filteri_inplace :
f:(key:BatHashtbl.S.key -> data:'a -> bool) -> 'a BatHashtbl.S.t -> unit
val filter_map :
f:(key:BatHashtbl.S.key -> data:'a -> 'b option) ->
'a BatHashtbl.S.t -> 'b BatHashtbl.S.t
val filter_map_inplace :
f:(key:BatHashtbl.S.key -> data:'a -> 'a option) ->
'a BatHashtbl.S.t -> unit
val fold :
f:(key:BatHashtbl.S.key -> data:'a -> 'b -> 'b) ->
'a BatHashtbl.S.t -> init:'b -> 'b
val modify :
key:BatHashtbl.S.key -> f:('a -> 'a) -> 'a BatHashtbl.S.t -> unit
val modify_def :
default:'a ->
key:BatHashtbl.S.key -> f:('a -> 'a) -> 'a BatHashtbl.S.t -> unit
val modify_opt :
key:BatHashtbl.S.key ->
f:('a option -> 'a option) -> 'a BatHashtbl.S.t -> unit
end`