(defun xesam-search-engines ()
"Return Xesam search engines, stored in `xesam-search-engines'.
The first search engine is the name owner of `xesam-service-search'.
-If there is no registered search engine at all, the function returns `nil'."
+If there is no registered search engine at all, the function returns nil."
(let ((services (dbus-ignore-errors
(dbus-list-queued-owners
:session xesam-service-search)))