Do not unref the returned object, it is owned by proxy.
DBusProxy.getInterfaceInfo
gio.dbus_interface_info.DBusInterfaceInfo getInterfaceInfo()Returns the #GDBusInterfaceInfo, if any, specifying the interface that proxy conforms to. See the #GDBusProxy:g-interface-info property for more details.
Returns
A #GDBusInterfaceInfo or null.