gobject:signal-handler-disconnect (object handler-id)

instance -- a g:object instance to remove the signal handler from
handler-id -- an unsigned long integer with the handler ID of the handler to be disconnected

Disconnects a handler from an instance so it will not be called during any future or currently ongoing emissions of the signal it has been connected to. The handler-id becomes invalid and may be reused.

The handler-id has to be a valid signal handler ID, connected to a signal of instance.