Function find_permutations

Source
fn find_permutations<'a>(
    initial_start: BTreeSet<&'a str>,
    remaining: usize,
    permutations: &mut BTreeSet<BTreeSet<&'a str>>,
    viable_features: &BTreeMap<&'a str, BTreeSet<&'a str>>,
    skip_feature_sets: &BTreeSet<BTreeSet<&'a str>>,
)