public static void ParseOptionsListChanged(Gst.Message message, out Gst.Interfaces.MixerOptions options)
        {
            IntPtr native_options;

            gst_mixer_message_parse_options_list_changed(message == null ? IntPtr.Zero : message.Handle, out native_options);
            options = (MixerOptions)GLib.Object.GetObject(native_options, false);
        }
        public static void ParseOptionChanged(Gst.Message message, out Gst.Interfaces.MixerOptions options, out string value)
        {
            IntPtr native_value;
            IntPtr native_options;

            gst_mixer_message_parse_option_changed(message == null ? IntPtr.Zero : message.Handle, out native_options, out native_value);

            options = (MixerOptions)GLib.Object.GetObject(native_options, false);
            value   = GLib.Marshaller.Utf8PtrToString(native_value);
        }