code: @SuppressWarnings("unchecked")
    protected <BUNDLE extends NlsBundle> BUNDLE getBundle(Class<BUNDLE> bundleInterface) {
  
      return (BUNDLE) this.bundleMap.get(bundleInterface);
    }
docs: This method gets the {@link NlsBundle} for the given {@code bundleInterface} from the internal map.
  
  @param <BUNDLE> is the generic type of the {@link NlsBundle}.
  
  @param bundleInterface is the class reflecting the {@link NlsBundle} interface.
  @return the {@link NlsBundle} implementation or {@code null} if NOT registered.