gtk:action-visible-overflown (object)

object -- a gtk:action object
visible -- a boolean whether a toolbar overflow menu is shown

The accessor for the visible-overflown slot of the gtk:action class. When true, toolitem proxies for this action are represented in the toolbar overflow menu. The gtk:action-visible-overflown function has been deprecated since version 3.10 and should not be used in newly written code.