gtk:center-box-center-widget (object)

object -- a gtk:center-box widget
child -- a gtk:widget center widget

Accessor of the center-widget slot of the gtk:center-box class. The gtk:center-box-center-widget function gets the center widget, or nil if there is none. The (setf gtk:center-box-center-widget) function sets the center widget. To remove the existing center widget, pass nil.