ASN1SetParser crls = (ASN1SetParser)((BERTaggedObjectParser)_nextObject).getObjectParser(DERTags.SET, false);
ASN1SetParser crls = (ASN1SetParser)((ASN1TaggedObjectParser)_nextObject).getObjectParser(DERTags.SET, false);
    public ASN1SetParser getCrls()        throws IOException    {        if (!_certsCalled)        {            throw new IOException("getCerts() has not been called.");        }        _crlsCalled = true;        if (_nextObject == null)        {            _nextObject = _seq.readObject();        }        if (_nextObject instanceof BERTaggedObjectParser && ((BERTaggedObjectParser)_nextObject).getTagNo() == 1)        {            ASN1SetParser crls = (ASN1SetParser)((BERTaggedObjectParser)_nextObject).getObjectParser(DERTags.SET, false);            _nextObject = null;            return crls;        }        return null;    }