Debug version of extension's JS

Hi,

By browsing the code, I found JS files in codebase/ext/ but I not found their “debug” versions.
My goal is to evaluate if several specific implementations are easy to do or not.
I have found some in sources/ext, but not all.
Is there an access to them please ? (like for reccuring.js, or others)

Thanks.

Edit: sorry, I have found them, at the root of sources/ and not in sources/ext!

Yep, recurring.js and property.js(units) are stored in the top level sources folder ( due to historical reasons )