#enum GtkReliefStyle
#Indicates the relief to be drawn around a GtkButton.
#@https://developer.gnome.org/gtk3/3.2/gtk3-Standard-Enumerations.html#GtkReliefStyle
extern class GtkReliefStyle `{GtkReliefStyle`}
	#Draw a normal relief.
	new normal `{ return GTK_RELIEF_NORMAL; `}

	#A half relief.
	new half `{ return GTK_RELIEF_HALF; `}

	#No relief.
	new none `{ return GTK_RELIEF_NONE; `}
end