code: public void addStatusMapping(Status status, Integer httpStatus) {
  		Assert.notNull(status, "Status must not be null");
  		Assert.notNull(httpStatus, "HttpStatus must not be null");
  		addStatusMapping(status.getCode(), httpStatus);
  	}
docs: Add a status mapping to the existing set.
  @param status the status to map
  @param httpStatus the http status