def METHOD_NAME():
    dataset_group_name = "name"
    dataset_group_arn = (
        f"arn:aws:forecast:{region}:{ACCOUNT_ID}:dataset-group/{dataset_group_name}"
    )
    client = boto3.client("forecast", region_name=region)
    client.create_dataset_group(DatasetGroupName=dataset_group_name, Domain="CUSTOM")
    client.update_dataset_group(DatasetGroupArn=dataset_group_arn, DatasetArns=[])