Adds a child. The @type parameter can be used to
differentiate the kind of child. #GtkContainer implements this
to add add a child widget to the container, #GtkNotebook uses
the @type to distinguish between page labels (of type "page-label")
and normal children.
Adds a child. The @type parameter can be used to differentiate the kind of child. #GtkContainer implements this to add add a child widget to the container, #GtkNotebook uses the @type to distinguish between page labels (of type "page-label") and normal children.