release-timer request. Timer requests with a negative
      expiration_time should be interpreted as a release-timer
      request.
class torch.distributed.elastic.timer.TimerClient
Client library to acquire and release countdown timers by
   communicating with the TimerServer.
abstract acquire(scope_id, expiration_time)
  Acquires a timer for the worker that holds this client object
  given the scope_id and expiration_time. Typically registers the
  timer with the TimerServer.

abstract release(scope_id)
  Releases the timer for the "scope_id" on the worker this client
  represents. After this method is called, the countdown timer on
  the scope is no longer in effect.
