What drag and drop library does FLEXIcontent use

Out of curiosity what drag and drop library does FLEXicontent use for the fields drag and drop??

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Looks like this is it:
\com_flexicontent_1.5_beta5a\admin\assets\js\sortables.js

Yep that's the one for drag and drop templating.
Another sample of its use can be found in JCE (layout feature)
For other drag and drop features, I use the one enclosed in the core mootools 1.11 lib. (the limit is that you can only move items inside ONE container)
Cheers,
Emmanuel.

that's what I though it was

I looked at it but didnt see any licensing information so i thought it was unique to FLEXicontent and was worried some Javascript I was going to use would interfere.
I'm a little more confident now

Thanks