code: public function getUrlsByLabel($label)
      {
          if (is_integer($this->focus)) {
              return $this->tagUrlsWithFrame(
                      $this->frames[$this->focus]->getUrlsByLabel($label),
                      $this->focus);
          }
          $urls = array();
          foreach ($this->frames as $index => $frame) {
              $urls = array_merge(
                      $urls,
                      $this->tagUrlsWithFrame(
                                  $frame->getUrlsByLabel($label),
                                  $index));
          }
  
          return $urls;
      }
docs: Accessor for URLs by the link label. Label will match regardess of whitespace issues and
  case.
  
  @param string $label    Text of link.
  
  @return array           List of links with that label.