gtk:tool-item-group-child-position (container child)

container -- a gtk:tool-item-group widget
child -- a gtk:widget child object
position -- an integer with the position of the item within the group

Accessor of the position child property of the gtk:tool-item-group class. The gtk:tool-item-group-child-position function gets the position of item in the list of children of container, or -1 if item is no child of container. The (setf gtk:tool-item-group-child-position) function sets the position, starting with 0, the position -1 means end of list.