function SyntheticClipboardEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}
Sets up this instance so that it is prepared for collecting metrics. Does
so such that this setup method may be used on an instance that is already
initialized, in a way that does not consume additional memory upon reuse.
That can be useful if you decide to make your subclass of this mixin a
"PooledClass".