code: def config(self, function):
          
          self.configurations.append(ConfigScope(function))
          return self.configurations[-1]
docs: Decorator to add a function to the configuration of the Experiment.
  
          The decorated function is turned into a
          :class:`~sacred.config_scope.ConfigScope` and added to the
          Ingredient/Experiment.
  
          When the experiment is run, this function will also be executed and
          all json-serializable local variables inside it will end up as entries
          in the configuration of the experiment.