private static byte [] verify(final byte [] utf8) {
        if (utf8.length > 0) {
            verifyFirst(utf8[0], utf8);
            for (int i=1; i < utf8.length; i++) {
                verifyAny(utf8[i], utf8);
            }
        }
        return utf8;

    }
This class is used to represent a legal identifier of [a-zA-Z_][a-zA-Z_0-9]*

@author baldersheim
vespajlib/src/main/java/com/yahoo/text/Identifier.java