Function setRefreshHandler

docs/external/js/react-dom.development.js:11585–11589

(handler)

  var failedBoundaries = null;
  var setRefreshHandler = function (handler) {
    {
      resolveFamily = handler;
    }
  };
  function resolveFunctionForHotReloading(type) {
    {
      if (resolveFamily === null) {