/*
 * call-seq:
 *      message -> string
 *
 * The content of the data message.
 */
static VALUE
data_msg_contents(VALUE obj)
{
    struct SpreadMessage *sp_mess;

    Data_Get_Struct(obj, struct SpreadMessage, sp_mess);
    return rb_str_new(sp_mess->message, sp_mess->length);
}