1 files changed, 10 insertions, 0 deletions
diff --git a/chain/src/atom/default.rs b/chain/src/atom/default.rs
index df61b6f..c6289f1 100644
--- a/chain/src/atom/default.rs
+++ b/chain/src/atom/default.rs
@@ -213,6 +213,11 @@ impl LabelGraph<LabelType<TNT>> for DefaultAtom {
     where
         Self: 'b;
 
+    type TupleIter<'b> = <DefaultNFA<LabelType<TNT>> as LabelGraph<LabelType<TNT>>>::TupleIter<'b>
+    where
+        Self: 'b,
+        DOption<TNT>: 'b;
+
     type LabelIter<'b> = <DefaultNFA<LabelType<TNT>> as LabelGraph<LabelType<TNT>>>::LabelIter<'b>
     where
         Self: 'b,
@@ -247,6 +252,11 @@ impl LabelGraph<LabelType<TNT>> for DefaultAtom {
     }
 
     #[inline]
+    fn tuples_of(&self, node_id: usize) -> Result<Self::TupleIter<'_>, GraphError> {
+        self.nfa.tuples_of(node_id)
+    }
+
+    #[inline]
     fn labels_of(&self, node_id: usize) -> Result<Self::LabelIter<'_>, GraphError> {
         self.nfa.labels_of(node_id)
     }