Function distance_oracle::distance_rule_recursive

pub(crate) fn distance_rule_recursive(
    received_certs: &FnvHashMap<IdtyIndex, Vec<IdtyIndex>>,
    referees: &FnvHashMap<IdtyIndex, u32>,
    idty: IdtyIndex,
    accessible_referees: &mut FnvHashSet<IdtyIndex>,
    known_idties: &mut FnvHashMap<IdtyIndex, u32>,
    depth: u32
)