public static Optional<TlsContext> getSystemTlsContext() {
        synchronized (TransportSecurityUtils.class) {
            Path configFile = getConfigFile().orElse(null);
            if (configFile == null) return Optional.empty();
            if (systemTlsContext == null) {
                systemTlsContext = new SystemTlsContext(configFile);
            }
            return Optional.of(systemTlsContext);
        }
    }
@return The shared {@link TlsContext} for the Vespa system environment
security-utils/src/main/java/com/yahoo/security/tls/TransportSecurityUtils.java