Name of method to invoke.
A #GVariant tuple with parameters for the signal or null if not passing parameters.
Flags from the #GDBusCallFlags enumeration.
The timeout in milliseconds (with G_MAXINT meaning "infinite") or -1 to use the proxy default timeout.
A #GUnixFDList or null.
Return location for a #GUnixFDList or null.
A #GCancellable or null.
null if error is set. Otherwise a #GVariant tuple with return values. Free with glib.variant.VariantG.unref.
Like gio.dbus_proxy.DBusProxy.callSync but also takes and returns #GUnixFDList objects.
This method is only available on UNIX.