/// Selection over discovered routes; completeness is relative to declared groups.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct TraceMaterialResult {
pub selected_candidates: Vec<u32>,
pub material_refs: Vec<String>,
pub covered_groups: Vec<u32>,
pub incomplete_groups: Vec<u32>,
pub benefit: u32,
pub evaluated: u32,
pub pruned_by_width: u32,
}