public static boolean isClientError(int code)
public boolean isClientError()
   public static boolean isClientError(int code)   {      boolean result = false;      switch(code)      {         case 400:         case 401:         case 402:         case 403:         case 404:         case 405:         case 406:         case 407:         case 408:         case 409:         case 410:         case 411:         case 412:         case 413:         case 414:         case 415:         case 416:         case 417:         case 422:         case 423:         case 424:            result = true;         break;      }      return result;   }