private static AppConfig loadYamlFile(final String filename) throws FileNotFoundException {
        LOGGER.info("1");
        Path path = getStroomAppFile(filename);
        LOGGER.info("2");

        try {
            final AppConfig appConfig = StroomYamlUtil.readAppConfig(path);
            LOGGER.info("3");
            return appConfig;
        } catch (final Exception e) {
            throw new RuntimeException("Error parsing " + path.toAbsolutePath().normalize(), e);
        }
    }
Verify dev.yml can be de-serialised into the config object model
stroom-config/stroom-config-app/src/test/java/stroom/config/app/TestStroomYamlUtil.java