code: @Nonnull
      public HttpHealthCheck addHealthCheck(String name, String url) {
          return addHealthCheck(name, url, DEFAULT_HEALTH_CHECK_INTERVAL_IN_SECONDS, DEFAULT_HEALTH_CHECK_TIMEOUT_IN_MILLISECONDS);
      }
docs: Adds a new health check, with the default interval (60 seconds) and timeout (0 milliseconds).
  
  @param name      the name of the health check
  @param url       the URL of the health check
  @return  a HttpHealthCheck instance representing the health check that has been added
  @throws IllegalArgumentException     if the name is empty, or the URL is not a well-formed URL