docs: public Set<HttpMethod> getAllow() {
  		String value = getFirst(ALLOW);
  		if (!StringUtils.isEmpty(value)) {
  			List<HttpMethod> allowedMethod = new ArrayList<HttpMethod>(5);
  			String[] tokens = value.split(",\\s*");
  			for (String token : tokens) {
  				allowedMethod.add(HttpMethod.valueOf(token));
  			}
  			return EnumSet.copyOf(allowedMethod);
  		}
  		else {
  			return EnumSet.noneOf(HttpMethod.class);
  		}
  	}