Sets our main struct and passes it to the parent class.
Get the main Gtk struct
the main Gtk struct as a void*
If @info is statically allocated does nothing. Otherwise increases the reference count.
If @info is statically allocated, does nothing. Otherwise decreases the reference count of @info. When its reference count drops to 0, the memory used is freed.
A pointer to a %NULL-terminated array of pointers to #GDBusAnnotationInfo structures or %NULL if there are no annotations.
A pointer to a %NULL-terminated array of pointers to #GDBusArgInfo structures or %NULL if there are no arguments.
The name of the D-Bus signal, e.g. "NameOwnerChanged".
The reference count or -1 if statically allocated.
the main Gtk struct
Information about a signal on a D-Bus interface.