the type id of the #GObject subtype to instantiate
the name of the first property
the value of the first property, followed optionally by more name/value pairs, followed by %NULL
a new instance of @object_type
ConstructionException GTK+ fails to create the object.
Creates a new instance of a #GObject subtype and sets its properties.
Construction parameters (see #G_PARAM_CONSTRUCT, #G_PARAM_CONSTRUCT_ONLY) which are not explicitly specified are set to their default values.