code: public static IModel<String> newResourceModel(final String resourceBundleKey)
  	{
  		return newResourceModel(ResourceBundleKey.builder().key(resourceBundleKey).build());
  	}
docs: Factory method to create a new {@link StringResourceModel} from the given ResourceBundleKey.
  
  @param resourceBundleKey
  the resource bundle key as String
  @return a new {@link StringResourceModel} as an {@link IModel}