Connects closure to the signal detailed_signal on #GSignalGroup:target.
You cannot connect a signal handler after #GSignalGroup:target has been set.
a string of the form signal-name with optional ::signal-detail
the closure to connect.
whether the handler should be called before or after the default handler of the signal.
Connects closure to the signal detailed_signal on #GSignalGroup:target.
You cannot connect a signal handler after #GSignalGroup:target has been set.