[Pharo-project] Two methods I don't understand in FileDirectory

[Adrien BARREAU]

Hello,

I'm taking a look in the Files package, and I don't understand what pieces of 
information these two methods are manipulating:
- getMacFileTypeAndCreator: fileName 
- setMacFileNamed: fileName type: typeString creator: creatorString

If somebody can explain me, it would be cool :)

Thanks,
Adrien.