flow like the river

BACK_BACK/node_modules/regenerator-transform/src/index.js

@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import { getVisitor } from "./visit";
+
+export default function (context) {
+  const plugin = {
+    visitor: getVisitor(context),
+  };
+
+  // Some presets manually call child presets, but fail to pass along the
+  // context object. Out of an abundance of caution, we verify that it
+  // exists first to avoid causing unnecessary breaking changes.
+  const version = context && context.version;
+
+  // The "name" property is not allowed in older versions of Babel (6.x)
+  // and will cause the plugin validator to throw an exception.
+  if (version && parseInt(version, 10) >= 7) {
+    plugin.name = "regenerator-transform";
+  }
+
+  return plugin;
+}