import asyncio

async def main():
    t = asyncio.create_task(asyncio.sleep(0))
    await t
    asyncio.print_call_graph(t)

asyncio.run(main())

    while coro is not None:
        if hasattr(coro, 'cr_await'):
            # A native coroutine or duck-type compatible iterator
            if coro.cr_frame is not None:
                st.append(FrameCallGraphEntry(coro.cr_frame))
            coro = coro.cr_await
        elif hasattr(coro, 'ag_await'):
            # A native async generator or duck-type compatible iterator
            st.append(FrameCallGraphEntry(coro.ag_frame))
            coro = coro.ag_await
        else:
            break