code: def dbg_repr(self):
          
          keys = self._storage.keys()
          offset_to_vars = { }
  
          for key in sorted(keys):
              ro = self._storage[key]
              variables = [ obj.obj for obj in ro.stored_objects ]
              offset_to_vars[key] = variables
  
          s = [ ]
          for offset, variables in offset_to_vars.items():
              s.append("Offset %#x: %s" % (offset, variables))
          return "\n".join(s)
docs: Get a debugging representation of this keyed region.
          :return: A string of debugging output.