in mqtt-publish-sample/mqttpublisher-gstreamer-plugin/mqttpublisher/gstmqttpublisher.cc [65:91]
static void gst_mqtt_publisher_class_init(GstMqttPublisherClass * klass) {
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_mqtt_publisher_set_property;
gobject_class->get_property = gst_mqtt_publisher_get_property;
gobject_class->finalize = gst_mqtt_publisher_finalize;
g_object_class_install_property(gobject_class, PROP_PUBLISH_TOPIC,
g_param_spec_string("publish-topic", "Publish Topic", "MQTT topic to publish",
"lookoutvision/anomalydetection/result",
G_PARAM_READWRITE));
gst_element_class_set_details_simple(gstelement_class,
"MqttPublisher",
"GstMqttPublisher",
"MQTT Publisher GStreamer plugin",
"Amazon");
gst_element_class_add_pad_template(gstelement_class,
gst_static_pad_template_get(&src_factory));
gst_element_class_add_pad_template(gstelement_class,
gst_static_pad_template_get(&sink_factory));
}