Function CallbackQueue

docs/lib/react.js:804–807

* A specialized pseudo-event module to help keep track of components waiting to * be notified when their DOM representations are available for use. * * This implements `PooledClass`, so you should never need to instantiate this. * Instead, use `CallbackQueue.getPooled()`. * * @class ReactMount

()

 * @internal
 */
function CallbackQueue() {
  this._callbacks = null;
  this._contexts = null;
}

_assign(CallbackQueue.prototype, {