docs: def extra_prepare(self, configuration, args_dict):
          """Called before the configuration.converters are activated"""
          aws_syncr = args_dict.pop("aws_syncr")
  
          self.configuration.update(
              { "$@": aws_syncr.get("extra", "")
              , "aws_syncr": aws_syncr
              , "templates": {}
              , "config_folder": self.configuration_folder
              }
          , source = "<args_dict>"
          )