who's setting value of kill-emacs-query-functions

[Pankaj Jangid]

I am not setting the value of this variable: kill-emacs-query-functions

But describe-variable shows this,

--8<---------------cut here---------------start------------->8---
kill-emacs-query-functions is a variable defined in ‘files.el’.

Its value is (server-kill-emacs-query-function desktop-kill)
Original value was nil
--8<---------------cut here---------------end--------------->8---

Is this expected behaviour on GNU/Linux with GNOME?