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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
type key
val declare_equiv_keys : key -> key -> unit
(** Declare two keys as being equivalent. *)
val equiv_keys : key -> key -> bool
(** Check equivalence of keys. *)
val constr_key : ('a -> ('a, 't, 'u, 'i) Constr.kind_of_term) -> 'a -> key option
(** Compute the head key of a term. *)
val pr_keys : (Names.GlobRef.t -> Pp.t) -> Pp.t
(** Pretty-print the mapping *)
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