code: public static IModel<String> newResourceModel(final String resourceKey,
  		final Component component)
  	{
  		return newResourceModel(resourceKey, component, null, "");
  	}
docs: Factory method to create a new {@link StringResourceModel} from the given resource key and
  given component.
  
  @param resourceKey
  the resource key
  @param component
  the component
  @return a new {@link StringResourceModel} as an {@link IModel}