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 g_variant_unref().
GException on failure.
2.30
Like g_dbus_proxy_call_sync() but also takes and returns #GUnixFDList objects.
This method is only available on UNIX.