My wife and I will be having fresh lawn installed in our backyard. I am going to be laying a travertine border around the new grass area. Should I install the paver border before or after the sod installation? When I have done this in the past, sod was already installed so I was able to only use an edge restraint on one side of the border since the grass held it in on the other side. Any input is greatly appreciated!

Thank you,
Jeff