class HerdStringHelper {

    public String getRequiredConfigurationValue(ConfigurationValue configurationValue)
    {
        String value = configurationHelper.getProperty(configurationValue);

        if (StringUtils.isBlank(value))
        {
            throw new IllegalStateException(String.format("Missing configuration parameter value for key \"%s\".", configurationValue.getKey()));
        }

        return value;
    }

}