code: def _model_trace_description(self):
          
          D = {}
          for name, fun in six.iteritems(self.model._funs_to_tally):
              arr = asarray(fun())
              D[name] = tables.Col.from_dtype(dtype((arr.dtype, arr.shape)))
          return D, {}
docs: Return a description of the table and the ObjectAtoms to be created.
  
          :Returns:
          table_description : dict
            A Description of the pyTables table.
          ObjectAtomsn : dict
            A
        in terms of PyTables
          columns, and a