code: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
      var events = EventPluginHub_1.extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);
      runEventQueueInBatch(events);
    }
docs: Streams a fired top-level event to `EventPluginHub` where plugins have the
  opportunity to create `ReactEvent`s to be dispatched.