code: public static String readSettings(String root, String index, String jsonFile) {
  		logger.trace("Reading [{}] for [{}] in [{}]...", jsonFile, index, root);
  		String settingsFile = root + "/" + index + "/" + jsonFile;
  		return readFileFromClasspath(settingsFile);
  	}
docs: Read index settings
  @param root dir within the classpath
  @param index index name
  @param jsonFile json file to read
  @return Settings