How to get access of cue.Vertex contained in cue.Value

[Nexucis]

Hello,

I'm trying to iterate other a Cuelang schema like this one: https://github.com/perses/perses/blob/main/cue/schemas/datasources/prometheus/prometheus.cue

And when there is an existing disjunction, my intuition to continue to iterate through it, is to use the struct cue.Vertex. But unfortunately I don't see how I can have access to it.

There is the type valueScope that implements the compile.Scope interface so I thought maybe there was a way to create this struct from a value. But so far I didn't find it.

Is it the good way to use cue.Vertex to iterate over a disjunction ? And if yes then could you please tell me how can I have access to it please ?

Thanks by advance !