code: public static HttpResponseStatus valueOf(int code) {
          switch (code) {
          case 250: return LOW_STORAGE_SPACE;
          case 302: return MOVED_TEMPORARILY;
          case 451: return PARAMETER_NOT_UNDERSTOOD;
          case 452: return CONFERENCE_NOT_FOUND;
          case 453: return NOT_ENOUGH_BANDWIDTH;
          case 454: return SESSION_NOT_FOUND;
          case 455: return METHOD_NOT_VALID;
          case 456: return HEADER_FIELD_NOT_VALID;
          case 457: return INVALID_RANGE;
          case 458: return PARAMETER_IS_READONLY;
          case 459: return AGGREGATE_OPERATION_NOT_ALLOWED;
          case 460: return ONLY_AGGREGATE_OPERATION_ALLOWED;
          case 461: return UNSUPPORTED_TRANSPORT;
          case 462: return DESTINATION_UNREACHABLE;
          case 463: return KEY_MANAGEMENT_FAILURE;
          case 505: return RTSP_VERSION_NOT_SUPPORTED;
          case 551: return OPTION_NOT_SUPPORTED;
          default:  return HttpResponseStatus.valueOf(code);
          }
      }
docs: Returns the {@link HttpResponseStatus} represented by the specified code.
  If the specified code is a standard RTSP getStatus code, a cached instance
  will be returned.  Otherwise, a new instance will be returned.