Specifies the name of the action with which this widget should be
associated. If action_name is NULL then the widget will be
unassociated from any previous action.
Usually this function is used when the widget is located (or will be
located) within the hierarchy of a GtkApplicationWindow.
Names are of the form "win.save" or "app.quit" for actions on the
containing GtkApplicationWindow or its associated GtkApplication,
respectively. This is the same form used for actions in the GMenu
associated with the window.
Specifies the name of the action with which this widget should be associated. If action_name is NULL then the widget will be unassociated from any previous action. Usually this function is used when the widget is located (or will be located) within the hierarchy of a GtkApplicationWindow. Names are of the form "win.save" or "app.quit" for actions on the containing GtkApplicationWindow or its associated GtkApplication, respectively. This is the same form used for actions in the GMenu associated with the window.