Hmmm, I think it might be best to change the routine's name entirely, since it doesn't really correspond to either case (the reason this wasn't already named wrt to Dilation is that this operation conserves flux in the profile, which is not what is intuitively required in the correlated noise case either!).

I can put this into #352, which after a bit of additional development work and some testing is almost ready (details to follow today).

What name would you guys think might work best in the correlated noise context, `applyRescaling`, `applyExpansion` ?  I'm warming to expansion...