code: public static boolean isContentAlwaysEmpty(HttpStatus status) {
          if (status.codeClass() == HttpStatusClass.INFORMATIONAL) {
              return true;
          }
  
          switch (status.code()) {
              case 204:
              case 205:
              case 304:
                  return true;
          }
          return false;
      }
docs: Returns {@code true} if the content of the response with the given {@link HttpStatus} is expected to
  be always empty (1xx, 204, 205 and 304 responses.)