static Map<PairS, Int> ai_ruleEngine2_mappingQualities(RuleEngine2.Rule rule) {
  new Map<PairS, Int> map;
  new Matches m;
  for (S s : rule.comments)
    if (match("* mapping: * to *", s, m)) {
      int value = eqic($1, "good") ? 1 : eqic($1, "bad") : -1 : 0;
      map.put(pair($2, $3), $1);
    }
  ret map;
}