docs: def factory1D(dependent_variables,
                    helper_functions):
          """Fields factory generating specialized container build around a
            triflow Model and xarray.
            Wrapper for 1D data.
  
            Parameters
            ----------
            dependent_variables : iterable for str
                name of the dependent variables
            helper_functions : iterable of str
                name of the helpers functions
  
            Returns
            -------
            triflow.BaseFields
                Specialized container which expose the data as a structured
                numpy array
            """
          return BaseFields.factory(("x", ),
                                    [(name, ("x", ))
                                     for name
                                     in dependent_variables],
                                    [(name, ("x", ))
                                     for name
                                     in helper_functions],)