func (c *Crawled) Add(url string) {
	c.mux.Lock()
	defer c.mux.Unlock()
	c.urls[url]++
}
// Add marks a URL as crawled
Add marks a URL as crawled
// Add marks a URL as crawled
func (c *Crawled) Add(url string) {
	c.mux.Lock()
	defer c.mux.Unlock()
	c.urls[url]++
}
func ( c * Crawled ) Add ( url string ) { c . mux . Lock ( ) defer c . mux . Unlock ( ) c . urls [ url ] ++ }
Add marks a URL as crawled
Add marks a URL as crawled