This signal is emitted when #GSignalGroup:target is set to a new value
other than %NULL. It is similar to #GObject::notify on target except it
will not emit when #GSignalGroup:target is %NULL and also allows for
receiving the #GObject without a data-race.
This signal is emitted when #GSignalGroup:target is set to a new value other than %NULL. It is similar to #GObject::notify on target except it will not emit when #GSignalGroup:target is %NULL and also allows for receiving the #GObject without a data-race.