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.
Name of the argument, e.g. @unix_user_id.
The reference count or -1 if statically allocated.
D-Bus signature of the argument (a single complete type).
the main Gtk struct
Information about an argument for a method or a signal.