Don't know if this will be added (since it doesn't exist in SA, but it would be nice if they did..).
I would solve this by creating a node group, like this (Also in the appended .blend):
Just add to you startup file and it should be ready to use in every new project (and/or import to existing projects).
(I used to have a small library of this kind of utility setups for Cycles, going to do it for Octane as well..)