2.1.2.1.1. Holder Class Example
public final class IntHolder
implements org.omg.CORBA.portable.Streamable {
    public int value;

    public IntHolder () { }
    public IntHolder (int o) { value = o; }

    public TypeCode _type () {
        return ORB.init ().get_primitive_tc (TCKind.tk_long);
    }

    public void _read (org.omg.CORBA.portable.InputStream in) {
        value = in.read_long ();
    }

    public void _write (org.omg.CORBA.portable.OutputStream out) {
        out.write_long (value);
    }
}