docs: def __load_all(self, config_filename):
          """
          Loads all stored routines into the RDBMS instance.
  
          :param str config_filename: string The filename of the configuration file.
          """
          self._read_configuration_file(config_filename)
          self.connect()
          self.__find_source_files()
          self._get_column_type()
          self.__read_stored_routine_metadata()
          self.__get_constants()
          self._get_old_stored_routine_info()
          self._get_correct_sql_mode()
          self.__load_stored_routines()
          self._drop_obsolete_routines()
          self.__remove_obsolete_metadata()
          self.__write_stored_routine_metadata()
          self.disconnect()