@Override
    public boolean hasUnsupportedCriticalExtension() {
        return (NativeCrypto.get_X509_ex_flags(mContext, this) & NativeConstants.EXFLAG_CRITICAL) != 0;
    }
An implementation of {@link X509Certificate} based on BoringSSL.
common/src/main/java/org/conscrypt/OpenSSLX509Certificate.java