Look into making the data stamping methods public.

[typesupply]

There may not be a good reason to make these private.

[typemytype]

There are some issues with the data stamping. Data stamping should be done after setting the self._glyphSet = glyphSet and self._path = path. The first time a font get saved the path will be still None for getting the data from disk to stamp.

I guess it's better to stamp at the end of the save operation for all objects. (Will send a patch later on)