gtk:action-visible-vertical (object)

object -- a gtk:action object
visible -- true to make the action visible vertically

Accessor of the visible-vertical of the gtk:action class. The gtk:action-visible-vertical function checks whether the action is visible when vertical. The (setf gtk:action-visible-vertical) function sets the visibility. The gtk:action-visible-vertical function has been deprecated since version 3.10 and should not be used in newly written code.