Creates a new #GtkToolButton using @icon_widget as contents and @label as label.
a widget that will be used as the button contents, or %NULL
a string that will be used as label, or %NULL
Return: A new #GtkToolButton
ConstructionException GTK+ fails to create the object.
2.4
See Implementation
Creates a new #GtkToolButton using @icon_widget as contents and @label as label.