/**
     * Test getters with null values.
     *
     * @throws IOException if an I/O error occurs
     * @throws PACDecodingException if a PAC decoding error occurs
     */
    @Test
    void testGettersWithNull() throws IOException, PACDecodingException {
        // Build a token with no optional fields
        ASN1EncodableVector vector = new ASN1EncodableVector();
        DERSequence sequence = new DERSequence(vector);