diff --git a/src/models.rs b/src/models.rs
index 4b6148d..8de20af 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -28,9 +28,10 @@ impl<'a> Iterator for VertexNeighborIterator<'a> {
     }
 }
 
-// TODO: Graph cannot support deleting vertices because of the external indices "Vertex". They could be made stable with e.g. slotmap or generational arena.
 // TODO: Graph fields must not be public.
 // TODO: Add functions to reserve memory for vertices and edges.
+// TODO: Graph cannot support deleting vertices because of the external indices "Vertex". They could be made stable with e.g. slotmap or generational arena.
+// TODO: Add function to delete vertices.
 // TODO: Add function to delete edges.
 // TODO: Add iterator of edges.
 pub struct Graph {