text: // Cache system is a bit outdated and could do with work
  
  module.exports = function(window, options, logger) {
      var cache = null;
      if (options.env !== 'development') {
          try {
              //cache = (typeof window.localStorage === 'undefined') ? null : window.localStorage;
          } catch (_) {}
      }
      return {
          setCSS: function(path, lastModified, styles) {
              if (cache) {
                  logger.info('saving ' + path + ' to cache.');
                  try {
                      cache.setItem(path, styles);
                      cache.setItem(path + ':timestamp', lastModified);
                  } catch(e) {
                      //TODO - could do with adding more robust error handling
                      logger.error('failed to save "' + path + '" to local storage for caching.');
                  }
              }
          },
          getCSS: function(path, webInfo) {
              var css       = cache && cache.getItem(path),
                  timestamp = cache && cache.getItem(path + ':timestamp');
  
              if (timestamp && webInfo.lastModified &&
                  (new Date(webInfo.lastModified).valueOf() ===
                      new Date(timestamp).valueOf())) {
                  // Use local copy
                  return css;
              }
          }
      };
  };
  