public String getCommentBlock(String prefix) {
        prefix = prefix + " ";
        StringBuilder ret = new StringBuilder();
        if (getComment().length() > 0) {
            StringTokenizer st = new StringTokenizer(getComment(), "\n");
            while (st.hasMoreTokens()) {
                ret.append(prefix).append(st.nextToken()).append("\n");
            }
        }
        return ret.toString();
    }
@param prefix  The prefix to use, usually an indent (spaces) followed by either '*' or "//"
@return a comment block where each line is prefixed, but the caller must close it if using '*'.
configgen/src/main/java/com/yahoo/config/codegen/CNode.java