code: public static ResourceManager get(String bundleName) {
          ResourceManager rm = (ResourceManager) nameToRM.get(bundleName);
          if (rm == null) {
              ResourceBundle rb = ResourceBundle.getBundle(bundleName);
              rm = new ResourceManager(rb);
              nameToRM.put(bundleName, rm);
          }
          return rm;
      }
docs: Gets the ResourceManager with the given name.
  
  @param bundleName
  @return the ResourceManager with the given name.