private static ProxyConfig loadYamlFile(final String filename) throws FileNotFoundException {
        Path path = getStroomProxyAppFile(filename);

        try {
            return ProxyYamlUtil.readProxyConfig(path);
        } catch (final IOException e) {
            throw new UncheckedIOException(e);
        }
    }
Verify dev.yml can be de-serialised into the config object model
stroom-proxy/stroom-proxy-app/src/test/java/stroom/proxy/dist/TestProxyYamlUtil.java