Niagara: Random Between Two Curves?

In Unity’s Shuriken particle engine, it’s possible to randomize between two curves or between two gradients.

image

How Shuriken handles randomizing between two curves in general:
image
https://docs.unity3d.com/351/Documentation/Manual/ParticleSystemCurveEditor.html

I’m still early in my learning of Niagara, but I haven’t been able to find an answer anywhere. Is there any built-in equivalent to this in Niagara? Perhaps (with regard to colors) some way to give each stop on a curve its own random range?