public static Optional<TransportSecurityOptions> getOptions(Map<String, String> envVariables) {
        return getConfigFile(envVariables)
                .map(TransportSecurityOptions::fromJsonFile);
    }
Utility class for retrieving {@link TransportSecurityOptions} from the system.

@author bjorncs
security-utils/src/main/java/com/yahoo/security/tls/TransportSecurityUtils.java