`getContainerRenderWindow` in Saturation component inside iframe is causing a crash

I'm rendering a custom picker inside an iframe that is using `Saturation` common component.
I'm receiving a CORS origin error that caused by the following code:


**getContainerRenderWindow**

```
var container = this.container;

var renderWindow = window;
while (!renderWindow.document.contains(container) && renderWindow.parent !== renderWindow) {
renderWindow = renderWindow.parent;
}
return renderWindow;
}
```

after evaluating `renderWindow = renderWindow.parent`, there's no document to access and it caused the failures. What is the propose behind that ?

a local fix was to override this method and return always `window`.

any insights ? it need to be used in prod

Start at the Saturation component's getContainerRenderWindow method and reproduce the failure with a custom picker inside an iframe. Trace the parent-window traversal and establish the intended behavior for cross-origin frames; done means the component no longer crashes while still selecting the correct render window.

Written by the indexing model from the issue text.