code: function(type, event, handler) {
          _.parsers.forEach(function(parser) {
              type = type.replace(parser[0], function() {
                  var args = _.slice(arguments, 1);
                  args.unshift(event, handler);
                  return parser[1].apply(event, args) || '';
              });
          });
          return type ? event.type = type : type;
      }
docs: only an extension hook