Access jquery annotator notes
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I am using [jquery annotator](https://github.com/okfn/annotator) to annotate and take notes on a site. I have the need to add additional style if the user has added a note. 

I am trying to create a small plugin that will add a class to the highlight if a note exists for that highlight, but I can't seem to get access to the note from within my plugin. 

Any help would be greatly appreciated!