gtk:button-box-layout (buttonbox)

buttonbox -- a gtk:button-box widget
style -- a value of the gtk:button-box-style enumeration

The gtk:button-box-layout function retrieves the method being used to arrange the buttons in a button box. The (setf gtk:button-box-layout) function changes the way buttons are arranged. The gtk:button-box-layout function is an abbreviation for the gtk:button-box-layout-style function.