Airline Environment only supports test tasks?

[addiaddiaddi]

match task_split:
    case "test":
        from tau_bench.envs.airline.tasks_test import TASKS as tasks
    case _:
        raise ValueError(f"Unknown task split: {task_split}")

Why is there only the test cases?

https://github.com/sierra-research/tau-bench/blob/main/tau_bench/envs/airline/env.py#L22