protected function isParsableImpl(&$value) {
        if (!parent::isParsableImpl($value)) {
            return FALSE;
        }

        return strpos($value, $this->currencySymbol) !== FALSE;
    }
 protected function isParsableImpl(&$value)
 {
     if (!parent::isParsableImpl($value)) {
         return FALSE;
     }
     $currencySymbol = Environment::getInstance()->getNumericFormattingElement('currency_symbol');
     return strpos($value, $currencySymbol) !== FALSE;
 }