diff --git a/mupt/mupr/primitives.py b/mupt/mupr/primitives.py
index 90c65092..87c58804 100644
--- a/mupt/mupr/primitives.py
+++ b/mupt/mupr/primitives.py
@@ -880,7 +880,6 @@ def set_connectivity_from_topology(
 
     
     # Resolution shift methods
-    ## TODO: make out-of-place versions of these methods (via optional_in_place for a start)?
     def check_self_consistent(self) -> None:
         '''
         Check sufficient conditions for whether the children of this Primitive, their
@@ -914,6 +913,8 @@ def contract(
         # if not target_labels.issubset(self.unique_child_labels):
         #     raise ValueError('Child Primitives labels chosen for contraction are not a proper subset of the children actually present')
 
+    # TODO: add out-of-place version of contract (once contract() is implemented)
+
     @property
     def expandable_children(self) -> set[PrimitiveHandle]:
         '''Set of all children (referenced by handle) which are capable of being expanded, ie. replaced with the hierarchy of their children'''