ASN1SetParser certs = (ASN1SetParser)((BERTaggedObjectParser)_nextObject).getObjectParser(DERTags.SET, false);
ASN1SetParser certs = (ASN1SetParser)((ASN1TaggedObjectParser)_nextObject).getObjectParser(DERTags.SET, false);
    public ASN1SetParser getCertificates()        throws IOException    {        _certsCalled = true;        _nextObject = _seq.readObject();        if (_nextObject instanceof BERTaggedObjectParser && ((BERTaggedObjectParser)_nextObject).getTagNo() == 0)        {            ASN1SetParser certs = (ASN1SetParser)((BERTaggedObjectParser)_nextObject).getObjectParser(DERTags.SET, false);            _nextObject = null;            return certs;        }        return null;    }