code: protected function normalize($scheme = true, $www = true)
      {
          $address = $this->address;
          if ($scheme && null === $this->get(self::PARSE_SCHEME)) {
              $address = sprintf('http://%s', $this->address);
          } elseif (!$scheme && $this->get(self::PARSE_SCHEME)) {
              $address = str_replace($this->get(self::PARSE_SCHEME) . '://', '', $this->address);
          }
  
          if (false === $www && 0 === strpos($this->get(self::PARSE_HOST), 'www.')) {
              $address = substr($address, 4);
          }
  
          return $address;
      }
docs: Return normalize address url
  
  @param boolean $scheme
  @param boolean $www
  @return string