How to use the octobot.api.backtesting.join_independent_backtesting function in OctoBot

async def initialize(self):
        try:
            await self.initializer.create()
            self.independent_backtesting = create_independent_backtesting(
                self.config,
                self.tentacles_setup_config,
                get_backtesting_data_files(self.config),
                run_on_common_part_only=self.run_on_common_part_only)
            await initialize_and_run_independent_backtesting(self.independent_backtesting, log_errors=False)
            await join_independent_backtesting(self.independent_backtesting)
            if self.log_report:
                log_independent_backtesting_report(self.independent_backtesting)
            await stop_independent_backtesting(self.independent_backtesting, memory_check=False)
        except Exception as e:
            self.logger.error(f"Error when starting backtesting: {e}")
        finally:
            self.task_manager.stop_tasks()

async def _run_backtesting(config, tentacles_setup_config):
    backtesting = create_independent_backtesting(config, tentacles_setup_config, [DATA_FILES["ETH/USDT"]], "")
    await initialize_and_run_independent_backtesting(backtesting, log_errors=False)
    await join_independent_backtesting(backtesting)
    return backtesting