Add todo comment

tailbone/views/master.py

@@ -1123,6 +1123,11 @@ class MasterView(View):
         """
         Perform actual "touch" logic for the given object.  Must return the
         :class:`rattail:~rattail.db.model.Change` record involved.
+
+        .. todo::
+           Why should this return the change object?  We're not using it for
+           anything (yet?) but some views may generate multiple changes when
+           touching the primary object, i.e. touch related objects also.
         """
         change = model.Change()
         change.class_name = obj.__class__.__name__