code: def add_config(self, cfg_or_file=None, **kw_conf):
          
          self.configurations.append(self._create_config_dict(cfg_or_file,
                                                              kw_conf))
docs: Add a configuration entry to this ingredient/experiment.
  
          Can be called with a filename, a dictionary xor with keyword arguments.
          Supported formats for the config-file so far are: ``json``, ``pickle``
          and ``yaml``.
  
          The resulting dictionary will be converted into a
           :class:`~sacred.config_scope.ConfigDict`.
  
          :param cfg_or_file: Configuration dictionary of filename of config file
                              to add to this ingredient/experiment.
          :type cfg_or_file: dict or str
          :param kw_conf: Configuration entries to be added to this
                          ingredient/experiment.