Workers graceful shutdown being sure that current executions are not truncated

Hi everyone,

I have Conductor workers running on Kubernetes pods.
I would like to handle the graceful shutdown in this way:

1. stop worker polling (I achieved this by implementing the function `paused()` of the `WorkerInterface`)
2. before executing the `sys.exit()` to terminate the pod, I want to be sure that the current worker executions will be finished without being truncated after the SIGTERM (so all the processes associated to the `TaskHandler` end)
3. finally execute `sys.exit()` to terminate the pod

I noticed that in the `TaskRunner` class, when the worker is paused, `None` is returned to the function `run_once`, but the function `run` is in a `while True` loop and I didn't understand how can I be sure when a worker is stopped and finished performing his task,

Is it possible to achieve the behaviour described in the 2nd point?
Thank you in advance.