errors working with babel 6, export v3 shared modules in main common module

common/script/api-v3/libs/extendableBuiltin.js

@@ -0,0 +1,11 @@
+// Babel 6 doesn't support extending native class (Error, Array, ...)
+// This function makes it possible to extend native classes with the same results as Babel 5
+module.exports = function extendableBuiltin (klass) {
+  function ExtendableBuiltin () {
+    klass.apply(this, arguments);
+  }
+  ExtendableBuiltin.prototype = Object.create(klass.prototype);
+  Object.setPrototypeOf(ExtendableBuiltin, klass);
+
+  return ExtendableBuiltin;
+};