code: @Override
      protected String getVersion(JSONObject json, String fileName) {
          String version = Constants.EMPTY_STRING;
          if (json.has(RESOLUTION)) {
              JSONObject jObj = json.getJSONObject(RESOLUTION);
              if (jObj.has(Constants.TAG)) {
                  return jObj.getString(Constants.TAG);
              }
              logger.debug("version not found in file {}", fileName);
              return Constants.EMPTY_STRING;
          }
          return version;
      }
docs: /* --- Overridden methods ---