Need help with Senocular's AS1 OOP tutorial, please

I’m trying to be a good boy and learn and search threads and knowledgebases, but I’m stumped.

In his collapsible menu example:

near the bottom of that page, in the source code…

There is a comment on line 37:

icon is one of many movieclips inside menu
Is icon a reserved word or something? Because I’m not seeing any instances named “icon” when viewing this file in Flash 8. Or is there some sneaky inspector or window I’m failing to find?

Seems as if “icon” senses all the movieclips but not the menu header graphic.

'sup with that?