// ',' represents a leaf node, which represents a private entry in the map.
      String domain = DIRECT_JOINER.join(stack);

      if (domain.length() > 0) {
        builder.put(domain, PublicSuffixType.fromCode(c));
      }
    }

    idx++;

    if (c != '?' && c != ',') {
      while (idx < encodedLen) {
        // Read all the children
        idx += doParseTrieToBuilder(stack, encoded, idx, builder);