def METHOD_NAME(self) -> None:
    os.makedirs(self.parent_dir, exist_ok=True)
    logger.info("Downloading artifacts from {} tasks".format(len(self.test_tasks)))
    for test_task in self.test_tasks:
        status = test_task["status"]["state"]
        task_id = test_task["status"]["taskId"]
        while status not in taskcluster.FINISHED_STATUSES:
            assert (
                status in taskcluster.ALL_STATUSES
            ), "State '{}' not recognized".format(status)
            logger.info(f"Waiting for task {task_id} to finish...")
            time.sleep(60)
            task_status = taskcluster.get_task_status(task_id)
            status = task_status["status"]["state"]
            # Update the task status, as we will use it to compare statuses later.
            test_task["status"]["state"] = status
    # Choose best tasks to download (e.g. 'completed' is better than 'failed')
    download_tasks = {}
    for test_task in self.test_tasks:
        status = test_task["status"]["state"]
        assert (
            status in taskcluster.FINISHED_STATUSES
        ), "State '{}' not recognized".format(status)
        chunk_name = taskcluster.get_chunk(test_task["task"])
        platform_name = taskcluster.get_platform(test_task["task"])
        if any(to_ignore in chunk_name for to_ignore in SUITES_TO_IGNORE):
            continue
        if (chunk_name, platform_name) not in download_tasks:
            # If the chunk hasn't been downloaded before, this is obviously the best task
            # to download it from.
            download_tasks[(chunk_name, platform_name)] = test_task
        else:
            # Otherwise, compare the status of this task with the previously selected task.
            prev_task = download_tasks[(chunk_name, platform_name)]
            if STATUS_VALUE[status] > STATUS_VALUE[prev_task["status"]["state"]]:
                download_tasks[(chunk_name, platform_name)] = test_task
    with ThreadPoolExecutorResult() as executor:
        futures = [
            executor.submit(self.download, test_task)
            for test_task in download_tasks.values()
        ]
        for future in concurrent.futures.as_completed(futures):
            exc = future.exception()
            if exc is not None:
                logger.error("Exception while downloading artifacts", exception=exc)
                for f in futures:
                    f.cancel()
    logger.info("Code coverage artifacts downloaded")