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-rw-r--r--lib/kernel/EphemeralRelation.ml1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/kernel/EphemeralRelation.ml b/lib/kernel/EphemeralRelation.ml
index 8aa0463..a837756 100644
--- a/lib/kernel/EphemeralRelation.ml
+++ b/lib/kernel/EphemeralRelation.ml
@@ -35,6 +35,7 @@ module Make (D : DERIVATION) = struct
method predicate = Ok None
method local_constraints = Ok None
method modes = Ok declaration
+ method to_string = "ephemeral-relation"
(* A cursor holds a reference to its relation, so the edges it reads
outlive a release of the relation that produced it. *)