I tried passing it straight through, but I'm getting an `Uncaught DataCloneError: Failed to execute 'postMessage' on 'Window': An object could not be cloned.` error.

```js
  "if (version) {"+
    "var versions = window.Ember.libraries;" +
    "window.postMessage({"+
      "type: 'emberVersion',"+
      "versions: versions"+
    "}, '*');"+
```