GtkWindowGroup Limit the effect of grabs #GtkWindowGroup objects are referenced by each window in the group, so once you have added all windows to a #GtkWindowGroup, you can drop the initial reference to the window group with g_object_unref(). If the windows in the window group are subsequently destroyed, then they will be removed from the window group and drop their references on the window group; when all window have been removed, the window group will be freed. @void: @Returns: @window_group: @window: @window_group: @window: @window_group: @Returns: @window_group: @Returns: @window_group: @device: @Returns: