static WoodyRule findWoodyRuleInSource(S src, S ruleName) {
  L<S> lines = lines(src);
  for i, S s over lines: {
    L<S> tok = javaTok(s);
    if (jfind(tok, "RULE " + ruleName) >= 0) {
      new WoodyRule rule;
      rule.nameInFile = ruleName;
      rule.lineInFile = i;
      
      Explain e = explain(s, ctxParsingRules(), "rule");
      if (e == null)
        fail("Bad rule: " + s);
      rule.condition = e.sub(1).string();
      int opening = indexOfTrim(lines, "{", i);
      if (opening >= 0) {
        for (i++; i < opening; i++) {
          L<S> tok2 = javaTok(lines.get(i));
          if (eqGet(tok2, 1, "[") && eqGet(tok2, 5, "]")
            && eqGet(tok2, 7, "="))
            rule.properties.put(tok2.get(3), unquoteCtx(trim(join(subList(tok2, 9)))));
        }
        int closing = indexOfClosingCurlyBracket(lines, opening);
        rule.body = lines(subList(lines, opening+1, closing));
      }
      ret rule;
    }
  }
  null;
}