code: private boolean load(ClassLoader classLoader) {
          boolean updated = false;
          URL url = null;
          try {
              Enumeration<URL> en = classLoader.getResources("org/threeten/bp/TZDB.dat");
              while (en.hasMoreElements()) {
                  url = en.nextElement();
                  updated |= load(url);
              }
          } catch (Exception ex) {
              throw new ZoneRulesException("Unable to load TZDB time-zone rules: " + url, ex);
          }
          return updated;
      }
docs: Loads the rules.
  
  @param classLoader  the class loader to use, not null
  @return true if updated
  @throws ZoneRulesException if unable to load