1 files changed, 10 insertions, 0 deletions
diff --git a/chain/src/default.rs b/chain/src/default.rs
index 85e3c8f..042f84e 100644
--- a/chain/src/default.rs
+++ b/chain/src/default.rs
@@ -324,6 +324,11 @@ impl LabelGraph<Edge> for DefaultChain {
     where
         Self: 'a;
 
+    type TupleIter<'a> = <DLGraph<Edge> as LabelGraph<Edge>>::TupleIter<'a>
+    where
+        Self: 'a,
+        Edge: 'a;
+
     type LabelIter<'a> = <DLGraph<Edge> as LabelGraph<Edge>>::LabelIter<'a>
     where
         Self: 'a,
@@ -349,6 +354,11 @@ impl LabelGraph<Edge> for DefaultChain {
     }
 
     #[inline]
+    fn tuples_of(&self, node_id: usize) -> Result<Self::TupleIter<'_>, GError> {
+        self.graph.tuples_of(node_id)
+    }
+
+    #[inline]
     fn labels_of(&self, node_id: usize) -> Result<Self::LabelIter<'_>, GError> {
         self.graph.labels_of(node_id)
     }