startSequence method
ASN1Sequence
startSequence()
Subclasses may want to call this to start the encoding sequence. All controls start with the OID and a critical flag, followed by the optional encoded control values
Implementation
ASN1Sequence startSequence() {
var seq = ASN1Sequence();
seq.add(ASN1OctetString(oid));
if (isCritical) seq.add(ASN1Boolean(isCritical));
return seq;
}