Calls the original class closure of a signal. This function should only
be called from an overridden class closure; see
g_signal_override_class_closure() and
g_signal_override_class_handler().
the argument list of the signal emission.
The first element in the array is a #GValue for the instance the signal
is being emitted on. The rest are any arguments to be passed to the signal.
Calls the original class closure of a signal. This function should only be called from an overridden class closure; see g_signal_override_class_closure() and g_signal_override_class_handler().