pub fn coupling_metrics(
graph: &Graph,
fragments: &[Fragment],
level: QuotientLevel,
root: Option<&str>,
edge_types: Option<&FxHashSet<EdgeCategory>>,
) -> Vec<ModuleMetrics>pub fn coupling_metrics(
graph: &Graph,
fragments: &[Fragment],
level: QuotientLevel,
root: Option<&str>,
edge_types: Option<&FxHashSet<EdgeCategory>>,
) -> Vec<ModuleMetrics>