dragClass doesn't work

[fraserredmond]

Maybe this is too new, and not finished/released yet, but dragClass doesn't seem to do anything for me (and it doesn't have the extra documentation in the readme that the other 2 similar class properties have.)

I've set the three classes to have different background colors, red and blue show up, but not green:
https://jsbin.com/kuqahegove/edit?html,css,js,output

ps. Sortable is great - thanks for your work!

[fraserredmond]

Never mind.

Didn't work in the jsbin, but was able to get it working in my app with more specific css selectors.