code: def mrs(self):
          
          mrs = self.get('mrs')
          if mrs is not None:
              if isinstance(mrs, dict):
                  mrs = Mrs.from_dict(mrs)
              elif isinstance(mrs, stringtypes):
                  mrs = simplemrs.loads_one(mrs)
          return mrs
docs: Deserialize and return an Mrs object for simplemrs or
          JSON-formatted MRS data; otherwise return the original string.