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diff --git a/lib/backend/managers/Handle.mli b/lib/backend/managers/Handle.mli
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+module type HANDLER = sig
+ type t
+ type handle
+ type cursor
+
+ val open_ : t -> path:Concepts.Path.t -> (handle, Concepts.Condition.condition) result
+
+ val open_cursor :
+ handle ->
+ args:Concepts.Value.value BatFingerTree.t ->
+ (cursor, Concepts.Condition.condition) result
+
+ val next : cursor -> (Concepts.Tuple.t option, Concepts.Condition.condition) result
+ val close : cursor -> unit
+end
+
+module Make (Store : Abstract.Storage.STORAGE) : sig
+ include HANDLER
+
+ val create : Object.rnt_object_tree -> Store.transaction -> t
+ val object_ : handle -> Object.registry
+end