public static MixedMode fromConfigValue(String configValue) {
        return Arrays.stream(values())
                .filter(v -> v.configValue.equals(configValue))
                .findFirst()
                .orElseThrow(() -> new IllegalArgumentException("Unknown value: " + configValue));
    }
@return Default value when mixed mode is not explicitly specified
security-utils/src/main/java/com/yahoo/security/tls/MixedMode.java