OBJECT TRACKING AND STATIC ROUTE IN IOS XR

Does anyone have a configuration for implementing reliable static routing
back up using enhanced object tracking on IOS XR4.0 .

E.g

ip route 0.0.0.0 0.0.0.0 Ethernet 0/1 10.1.1.242 track 123 ----IN IOS

Looking for similar functionality in IOS-XR

I cant seem to find where to tie the tracked object to the static
route on XR 4.0

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