Function mk_cv

crates/compile/src/graph.rs:191–193

(name: &str)

      Some((out_refs, in_refs))
    })
    .reduce(
      || (RefMap::default(), RefMap::default()),
      |(out_l, in_l), (out_r, in_r)| (merge(out_l, out_r), merge(in_l, in_r)),
    );

  //assert_eq!(env.len(), out_refs.len());