> I remember that Alex recently mentioned a method how to get the
> signature of any function or method definition loaded in the system.
I'm not completely sure what you mean with signature in this context.
You can inspect a function by pretty-printing,
: (pp 'insert)
(de insert (N Lst X)
(conc (cut (dec N) 'Lst) (cons X) Lst) )
by looking at it with an editor (sorry, only 'vim' at the moment),
: (vi 'insert)
or access its reference
: (doc 'insert)
A "signature" in the sense of C or Java is perhaps
: (car insert)
-> (N Lst X)
i.e. the formal parameters of the function.