code: public void format(StringBuffer fmt, Set done, Set todo, int indent) {
      formatName(fmt, indent);
      fmt.append("*(\n");
      itemType.format(fmt, done, todo, indent + 2);
      fmt.append("\n");
      indent(fmt, indent);
      fmt.append(")*");
    }
docs: Convert to printable form (subroutine of toString)