Meta.Multi_modelval sexp_of_t : (int -> Core.Sexp.t) -> t -> Core.Sexp.tval find_exn : t -> int -> Model.Hidden.tval set : t -> key:int -> data:Model.Hidden.t -> tval to_models : t -> Model.Hidden.t Core.Int.Map.tval of_models : Model.Hidden.t Core.Int.Map.t -> t