Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/node_modules/@redux-saga/deferred/dist/redux-saga-deferred.esm.js

@@ -0,0 +1,20 @@
+function deferred() {
+  var def = {};
+  def.promise = new Promise(function (resolve, reject) {
+    def.resolve = resolve;
+    def.reject = reject;
+  });
+  return def;
+}
+function arrayOfDeferred(length) {
+  var arr = [];
+
+  for (var i = 0; i < length; i++) {
+    arr.push(deferred());
+  }
+
+  return arr;
+}
+
+export default deferred;
+export { arrayOfDeferred };