/**
  * Wrapper for t3lib_div::testInt and \TYPO3\CMS\Core\Utility\MathUtility::canBeInterpretedAsInteger($var)
  * @param mixed $var
  * @return boolean
  * @deprecated use tx_rnbase_util_Math::isInteger
  */
 public static function isInteger($var)
 {
     return Tx_Rnbase_Utility_Strings::isInteger($var);
 }