Virtualvfunc_Virtualvfunc_Gets D-Bus introspection information for the D-Bus interface
implemented by interface_.
This can return null if no Gio.DBusInterfaceInfo was provided during
construction of interface_ and is also not made available otherwise.
For example, Gio.DBusProxy implements Gio.DBusInterface but allows for a null
Gio.DBusInterfaceInfo.
Virtualvfunc_Sets the Gio.DBusObject for interface_ to object.
Note that interface_ will hold a weak reference to object.
A Gio.DBusObject or null.
Interface for implementing DBusInterface. Contains only the virtual methods that need to be implemented.