@Override
    protected void parse ( byte[] token ) throws IOException {

        try ( ASN1InputStream is = new ASN1InputStream(token) ) {
            ASN1TaggedObject constructed = (ASN1TaggedObject) is.readObject();
            if ( constructed == null || constructed.getTagClass() != BERTags.APPLICATION ||
                    !(constructed.getBaseObject() instanceof  ASN1Sequence) )

    }


    @Override
    protected void parse ( byte[] token ) throws IOException {
        try ( ASN1InputStream der = new ASN1InputStream(token) ) {
            ASN1TaggedObject tagged = (ASN1TaggedObject) der.readObject();
            ASN1Sequence sequence = ASN1Sequence.getInstance(tagged, true);
            Enumeration<?> fields = sequence.getObjects();
            while ( fields.hasMoreElements() ) {

        }

        try ( ASN1InputStream stream = new ASN1InputStream(content) ) {

            ASN1ObjectIdentifier kerberosOid = (ASN1ObjectIdentifier) stream.readObject();
            if ( !kerberosOid.getId().equals(KerberosConstants.KERBEROS_OID) )
                throw new PACDecodingException("Not a kerberos token");

     * @throws IOException
     */
    public static <T extends ASN1Primitive> T as ( Class<T> type, ASN1InputStream stream ) throws PACDecodingException, IOException {
        return as(type, stream.readObject());
    }


    /**
     *
     * @param type
     * @param tagged
     * @return tagged object contents cast to type
     * @throws PACDecodingException
     */