How to avoid vertical bars enclosing function name in generated Lisp code

Hello,

I'm trying to call a Lisp function in Spad. The problem is that I don't
want to import it. If I use 'FOO(something)$Lisp' the generated Lisp
code is approximately '(FOO something)' but if I append its package
name, 'FOO_:_:BAR(something)$Lisp', the Spad compiler encloses it in
vertical bars, the generated code becomes (|FOO::BAR| something). Is it
possible to avoid this ? And, if not, any idea where I can look to
modify this behavior ?

Greg