code: def _get_data_schema(self):
          
  
          if not hasattr(self, "_data_schema"):
              response = self.__proxy__.get_data_schema()
  
              self._data_schema = {k : _turicreate._cython.cy_flexible_type.pytype_from_type_name(v)
                                   for k, v in response["schema"].items()}
  
          return self._data_schema
docs: Returns a dictionary of (column : type) for the data used in the
          model.