@Override
    public Object getValue(String name) {
        throw new UnsupportedOperationException(
                "All calls to this method should be intercepted by ExternalSession.");
    }
Returns the signed certificate timestamp (SCT) received from the peer. Returns a
copy of the internal array.

@see <a href="https://tools.ietf.org/html/rfc6962">RFC 6962</a>
common/src/main/java/org/conscrypt/ActiveSession.java