There are three reasons for my question:

first:

curiosity

second:

I've seen people to become desperate with the definition of a import() method. If yuo dan't know about it, you wander, why your method is called "statical". I want to avoid things like that.

third:

I write an attribute-extension for subroutines and I want to check, if you define an attribute to an perl-internal method, that this can cause problems. It's the automatic way for the second reason.