287     """handle an infinite recursion safety belt"""

   287     """handle an infinite recursion safety belt"""

   288     if done is None:

   288     if done is None:

   289         done = set()

   289         done = set()

   290     entity = view.entity(row, col)

   290     entity = view.entity(row, col)

   291     if entity.eid in done:

   291     if entity.eid in done:

   294         return None, msg

   296         return None, msg

   295     done.add(entity.eid)

   297     done.add(entity.eid)

   296     return done, entity

   298     return done, entity

   297 

   299 

   298 

   300