private static boolean hasSAN(List<TLSProperties.CertificateProperties.SubjectAltName> subjectAltNameList) {
        for (final TLSProperties.CertificateProperties.SubjectAltName san : subjectAltNameList) {
            // Don't check DNS for now, as it is tagged not-implemented in ALS v2
            if (!isNullOrEmpty(san.getUri())) {
                return true;
            }
        }
        return false;
    }
@param subjectAltNameList from ALS LocalCertificateProperties and PeerCertificateProperties
@return true is there is at least one SAN, based on URI check.
oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/envoy/als/LogEntry2MetricsAdapter.java