You wouldn't be able to simply; the same issues exist as in ES3 in this regard. (I wrote about them extensively years back here: http://mikegerwitz.com/papers/

You wouldn't be able to simply; the same issues exist as in ES3 in this regard. (I wrote about them extensively years back here: http://mikegerwitz.com/papers/coope/coope.pdf. http://mikegerwitz.com/papers/coope/coope.pdf.)