Function first

tests/test_async_transition_gate.py:19–24

()

    release_first = asyncio.Event()

    async def first() -> None:
        async with gate.hold():
            first_holding.set()
            order.append("first-in")
            await release_first.wait()
        order.append("first-out")

    async def second() -> None:
        async with gate.hold():