diff --git a/src/models/append_graph.rs b/src/models/append_graph.rs
index eef3575..d0abc41 100644
--- a/src/models/append_graph.rs
+++ b/src/models/append_graph.rs
@@ -40,7 +40,6 @@ impl<'a> Iterator for RawIncidenceIterator<'a> {
 }
 
 pub struct AppendGraph {
-    // TODO: Index 'vertices' by a 'Vertex' instead of 'Vertex.0'?
     vertices: Vec<VertexIncidenceHeader>,
     incidences: Vec<IncidenceEntry>,
 }