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module Crit_bit

: sig
#
type 'data t
#
val empty : 'data t
#
val find : 'data t -> string -> 'data option
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val add : 'data t -> key:string -> data:'data -> 'data t
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val remove : 'data t -> string -> 'data t
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val iter : 'data t -> f:(key:string -> data:'data -> unit) -> unit
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val map : 'data t -> f:('data -> 'b) -> 'b t
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val fold : 'data t -> init:'b -> f:(key:string -> data:'data -> 'b -> 'b) -> 'b
end