+ /**
+ * GProxyAddress:destination-protocol:
+ *
+ * The protocol being spoke to the destination host, or %NULL if
+ * the #GProxyAddress doesn't know.
+ *
+ * Since: 2.34
+ */
+ g_object_class_install_property (gobject_class,
+ PROP_DESTINATION_PROTOCOL,
+ g_param_spec_string ("destination-protocol",
+ P_("Destionation Protocol"),
+ P_("The proxy destination protocol"),
+ NULL,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY |
+ G_PARAM_STATIC_STRINGS));
+