Slurs in alternate endings

I have an alternative ending that includes a slur. I know there is a \repeatTie command for ties across alternate endings, but is there anything as simple for slurs?

Slur across alternate ending - with example

So I figured out how to make and adjust a slur on my own. I am really wondering though if there is a more elegant way like how simple it is to do \repeatTie. \version "2.18.2" \language "english" \relative c'' { \key d \major \time 4/4 \repeat volta 2 { d4 d8 d8~ d8 a4 d8( }