Can you define discrete time slices for network dynamic temporal visualizations?

Using the ndtv (Network Dynamic Temporal Visualizations) package I’m trying to render an animation of defined list of time slices, instead of slices at a defined interval.

From ndtv vignette (pg 7) the slice parameter can be used to define start, end, and interval.

slice.par<-list(start=75, end=100, interval=1)

instead I would like to slice at defined intervals that are not equally spaced, maybe something like:

slice.par<-list(start=75, end=100, interval=c(75, 82, 85, 98, 100))

Is this doable somehow? Everything I’ve found passes only an interval parameter..