Gluster users - Jan 2018 - what do you do when your peer has to change IP?

hi everyone

I understand this should be trivial.
I'm amazed by the lack of tool in gluster tool kit which 
would swap peer IP when it is the only change in the 
cluster. Peer naturally is a brick in volumes.
Or I'm oblivious to the fact that gluster command line 
actually does this?

What do you do when you have to change one thing - peer IP - 
and do not to do remove / add? (because it does not make 
sense when you only change IP, right?)

many thanks, L.