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(*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*)
include IterLabels
module Import = struct
type 'a iter = 'a t
end
let pop seq =
match head seq with Some x -> Some (x, drop 1 seq) | None -> None