code: func (l *leaseManager) setLeaseReuseDurationSeconds(duration int64) {
  	l.leaseMu.Lock()
  	defer l.leaseMu.Unlock()
  	l.leaseReuseDurationSeconds = duration
  }
docs: // setLeaseReuseDurationSeconds is used for testing purpose. It is used to
  // reduce the extra lease duration to avoid unnecessary timeout in testing.