public static function cutStringToWords($subject, $maxWordsCount, $trimChars = " \t\n\r\v")
 {
     self::$subjectChanged = false;
     $pattern = '/([^\\s\\n\\r]+[\\s\\n\\r]+){' . $maxWordsCount . '}/s';
     if (self::$unicode) {
         $pattern .= 'u';
     }
     if (preg_match($pattern, $subject, $match)) {
         $subject = rtrim($match[0], $trimChars);
         self::$subjectChanged = true;
     }
     return $subject;
 }