The task id.
The task execution id.
The cancel signal of the task. It can be used to gracefully shutdown the task run function when the task has been cancelled.
The shutdown signal of the executor. It is cancelled when the executor is shutting down. It can be used to gracefully shutdown the task when executor is shutting down.
The attempt number of the task. The first attempt is 0, the second attempt is 1, etc.
Optional
prevThe error of the previous attempt.
The context object passed to a durable task when it is run.