code: func (c *channel) stopDeleteTimer() {
  	if c.activity.timer != nil {
  		c.activity.timer.Stop()
  		c.activity.timerSet = false
  		if c.stan.debug {
  			c.stan.log.Debugf("Channel %q delete timer stopped", c.name)
  		}
  	}
  }
docs: // Stops the delete timer.
  // The channelStore's mutex must be held on entry.