3d object tracking, changing tracked object prefab based on which reference object is detected

I'm using object tracking (using 3d scans), and specifically I am wanting to know how to change the Tracked Object Prefab depending on which Reference Object has been detected. Has anyone solve this issue?

 

I'm trying to use a specific XRReferenceObject within a XRReferenceObjectLibrary.

So what is AR foundations approach for accessing a variable like this?

Here's an if statement showing what I'm trying to do:

if (XRReferenceObject.name, from XRReferenceObjectLibrary, is detected)
{
ARTrackedObject equals prefab1;
}

I want to make sure I have the correct variable names. Some example code would be extremely helpful. Thank you.