define-public vs. define-safe-public

[Malte Meyn]

Hi list,

is there a clear policy which functions are defined public or 
safe-public? Asking for 
https://sourceforge.net/p/testlilyissues/issues/5517/ If I understand 
correctly what define-safe-public does I don’t understand why some 
things at the beginning of lily-library.scm are public and others 
safe-public.

Cheers,
Malte