code: @Override
  	protected void configure(ServletRegistration.Dynamic registration) {
  		super.configure(registration);
  		String[] urlMapping = StringUtils.toStringArray(this.urlMappings);
  		if (urlMapping.length == 0 && this.alwaysMapUrl) {
  			urlMapping = DEFAULT_MAPPINGS;
  		}
  		if (!ObjectUtils.isEmpty(urlMapping)) {
  			registration.addMapping(urlMapping);
  		}
  		registration.setLoadOnStartup(this.loadOnStartup);
  		if (this.multipartConfig != null) {
  			registration.setMultipartConfig(this.multipartConfig);
  		}
  	}
docs: Configure registration settings. Subclasses can override this method to perform
  additional configuration if required.
  @param registration the registration