Is there a glossary for the icons in MonoDevelop

So, it's pretty clear that Unity has fairly specific icons for different types items that show in the Document outline and autocomplete window. Usually these are pretty easy to figure out(purple diamonds are functions, blue diamonds are variables, there will be a key or a lock based on their protection level, etc), but there are a few scenarios where things will show up with an icon I don't recognize. For example, today I was adding an event Listener and accidentally opened the Autocomplete window and noticed a purple diamond with a yellow spark on it that appeared to be a contextually generated listener name, but I wasn't sure. I've searched and searched for a dictionary that defines these, but haven't had any luck so far. Does anybody know of such a resource? Or is anybody super awesome that just KNOWS them all?