dbus-unregister-object is a compiled Lisp function in `dbus.el'.

(dbus-unregister-object OBJECT)

Unregister OBJECT from D-Bus.
OBJECT must be the result of a preceding `dbus-register-method',
`dbus-register-property' or `dbus-register-signal' call. It
returns `t' if OBJECT has been unregistered, `nil' otherwise.

When OBJECT identifies the last method or property, which is
registered for the respective service, Emacs releases its
association to the service from D-Bus.