Summary: `onLayout` event is fired when some layoutable node got inserted or updated (with changed layout) during commit phase. Reviewed By: fkgozali Differential Revision: D8119826 fbshipit-source-id: 831003c88fe5c4358a80328aa715be80e484b52e
Summary: This also illustrates how we should use EventHandlers objects. Reviewed By: fkgozali Differential Revision: D8053357 fbshipit-source-id: cba084c8a871e40c7536720fce290c3467d33061