Restructured library.

lib/3rdparty/systemjs/babel-helpers/asyncIterator.js

@@ -0,0 +1,14 @@
+export default (function (iterable) {
+  if (typeof Symbol === "function") {
+    if (Symbol.asyncIterator) {
+      var method = iterable[Symbol.asyncIterator];
+      if (method != null) return method.call(iterable);
+    }
+
+    if (Symbol.iterator) {
+      return iterable[Symbol.iterator]();
+    }
+  }
+
+  throw new TypeError("Object is not async iterable");
+});