code: public static HttpResponseStatus valueOf(int code, String reasonPhrase) {
          HttpResponseStatus responseStatus = valueOf0(code);
          return responseStatus != null && responseStatus.reasonPhrase().contentEquals(reasonPhrase) ? responseStatus :
                  new HttpResponseStatus(code, reasonPhrase);
      }
docs: Returns the {@link HttpResponseStatus} represented by the specified {@code code} and {@code reasonPhrase}.
  If the specified code is a standard HTTP status {@code code} and {@code reasonPhrase}, a cached instance
  will be returned. Otherwise, a new instance will be returned.
  @param code The response code value.
  @param reasonPhrase The response code reason phrase.
  @return the {@link HttpResponseStatus} represented by the specified {@code code} and {@code reasonPhrase}.