code: public void setUrlMappings(Collection<String> urlMappings) {
  		Assert.notNull(urlMappings, "UrlMappings must not be null");
  		this.urlMappings = new LinkedHashSet<>(urlMappings);
  	}
docs: Set the URL mappings for the servlet. If not specified the mapping will default to
  '/'. This will replace any previously specified mappings.
  @param urlMappings the mappings to set
  @see #addUrlMappings(String...)