Connects @c_handler to the signal @detailed_signal on the target instance of @self.
The @c_handler will be called after the default handler of the signal.
You cannot connect a signal handler after #GSignalGroup:target has been set.
a string of the form "signal-name::detail"
the #GCallback to connect
the data to pass to @c_handler calls
2.72
See Implementation
Connects @c_handler to the signal @detailed_signal on the target instance of @self.
The @c_handler will be called after the default handler of the signal.
You cannot connect a signal handler after #GSignalGroup:target has been set.