`sig
val cast : 'a Gobject.obj -> Gtk.size_group
module P :
sig
val mode : ([> `sizegroup ], GtkEnums.size_group_mode) Gobject.property
end
val create : [ `sizegroup ] Gobject.param list -> Gtk.size_group
external add_widget :
[> `sizegroup ] Gtk.obj -> [> `widget ] Gtk.obj -> unit
= "ml_gtk_size_group_add_widget"
external remove_widget :
[> `sizegroup ] Gtk.obj -> [> `widget ] Gtk.obj -> unit
= "ml_gtk_size_group_remove_widget"
end`