Function getPooledEvent

docs/external/js/react-dom.development.js:8694–8704

(dispatchConfig, targetInst, nativeEvent, nativeInst)

  }

  function getPooledEvent(dispatchConfig, targetInst, nativeEvent, nativeInst) {
    var EventConstructor = this;

    if (EventConstructor.eventPool.length) {
      var instance = EventConstructor.eventPool.pop();
      EventConstructor.call(instance, dispatchConfig, targetInst, nativeEvent, nativeInst);
      return instance;
    }

    return new EventConstructor(dispatchConfig, targetInst, nativeEvent, nativeInst);
  }

  function releasePooledEvent(event) {
    var EventConstructor = this;