protected methods

By the way, I found some good examples of protected methods (or to be
pedantic, methods that subclasses override but that users aren't
supposed to call):

postMixInProperties()
fillInTemplate()
postCreate()
onResized()

etc.

We can't very well start putting underscores in front of those method
names now.  It would be nice if we had some way to notate their status
to the parser though, so those functions showed as a different color or
something.