code: func (c *CheckAlias) Start() {
  	c.stopLock.Lock()
  	defer c.stopLock.Unlock()
  	c.stop = false
  	c.stopCh = make(chan struct{})
  	go c.run(c.stopCh)
  }
docs: // Start is used to start the check, runs until Stop() func (c *CheckAlias) Start() {