code: func (c *NamingConditionController) processNextWorkItem() bool {
  	key, quit := c.queue.Get()
  	if quit {
  		return false
  	}
  	defer c.queue.Done(key)
  
  	err := c.syncFn(key.(string))
  	if err == nil {
  		c.queue.Forget(key)
  		return true
  	}
  
  	utilruntime.HandleError(fmt.Errorf("%v failed with: %v", key, err))
  	c.queue.AddRateLimited(key)
  
  	return true
  }
docs: // processNextWorkItem deals with one key off the queue.  It returns false when it's time to quit.