The unique name that owns the name that proxy is for or NULL if
no-one currently owns that name. You may connect to the
GObject::notify signal to track changes to the
GDBusProxy:g-name-owner property.
Available since: 2.26
Return value
Type:gchar*
The name owner or NULL if no name
owner exists. Free with g_free().
The caller of the method takes ownership of the data, and is responsible for freeing it.