append("new char[] {").endl();
code.tab(2).append("'0', '1', '2', '3', '4', '5', '6', '7',").
endl();
code.tab(2).append("'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'").
endl();
code.tab().append("};").endl(2);
}
// static block to register class
code.tab().append("static").openBrace(2).endl();
code.tab(2).append("// register persistent class in JVM").endl();