code: function() {
              var s = Storage.storage();
              if (s == null) {
                  return false;
              }
              Object.keys(s).forEach(function(key){
                  if (key.indexOf("cache_") == 0 && key.indexOf("cache_"+configs.revision) ) {
                      s.removeItem(key);
                  }
              });
          }
docs: Initialize the cache : delete all the "old-version" values
  
  @method init