KPolylineExtensions.addHeadArrowDecorator(KPolyline)
addAction(KRendering, Trigger, String, ModifierState, ModifierState, ModifierState)
addDoubleClickAction(KRendering, String, ModifierState, ModifierState, ModifierState)
addSingleClickAction(KRendering, String, ModifierState, ModifierState, ModifierState)
addSingleOrMultiClickAction(KRendering, String, ModifierState, ModifierState, ModifierState)
KPolylineExtensions.addHeadArrowDecorator(KPolyline)instead.