original_string: public function getUserLibraryFeed($location = null)
      {
          if ($location == null) {
              $uri = self::MY_LIBRARY_FEED_URI;
          } else {
              $uri = $location;
          }
          return parent::getFeed($uri, 'Zend_Gdata_Books_VolumeFeed');
      }
code: public function getUserLibraryFeed($location = null)
      {
          if ($location == null) {
              $uri = self::MY_LIBRARY_FEED_URI;
          } else {
              $uri = $location;
          }
          return parent::getFeed($uri, 'Zend_Gdata_Books_VolumeFeed');
      }
code_tokens: public function getUserLibraryFeed ( $ location = null ) { if ( $ location == null ) { $ uri = self :: MY_LIBRARY_FEED_URI ; } else { $ uri = $ location ; } return parent :: getFeed ( $ uri , 'Zend_Gdata_Books_VolumeFeed' ) ; }
docstring: Retrieves a feed of volumes, by default the User library feed.
  
  @param Zend_Gdata_Query|string|null $location (optional) The URL to
  query.
  @return Zend_Gdata_Books_VolumeFeed The feed of volumes found at the
  specified URL.
docstring_tokens: Retrieves a feed of volumes by default the User library feed .