message: Added doc comment
diff: @@ -245,6 +245,11 @@ public:
  LnkLstPtr get_linklist_ptr(ColKey col_key) const;
  LnkLst get_linklist(StringData col_name) const;
  + /// Get a type-erased list instance for the given list column.
  + ///
  + /// Note: For lists of links, this always returns a `LnkLst`, rather than a
  + /// `Lst<ObjKey>`. Use `get_list_ptr<ObjKey>(col_key)` to get a list of
  + /// links with uncondensed indices.
  LstBasePtr get_listbase_ptr(ColKey col_key) const;
  template <typename U>
  