code: public StaticResourceRequestMatcher at(StaticResourceLocation first,
  			StaticResourceLocation... rest) {
  		return at(EnumSet.of(first, rest));
  	}
docs: Returns a matcher that includes the specified {@link StaticResourceLocation
  Locations}. For example: <pre class="code">
  PathRequest.toStaticResources().at(StaticResourceLocation.CSS, StaticResourceLocation.JAVA_SCRIPT)
  </pre>
  @param first the first location to include
  @param rest additional locations to include
  @return the configured {@link RequestMatcher}