Prado\Web\UI\WebControls\TOutputCache::setDuration PHP Метод

    public function setDuration($value)
    {
        if (($value = TPropertyValue::ensureInteger($value)) < 0) {
            throw new TInvalidDataValueException('outputcache_duration_invalid', get_class($this));
        }
        $this->_duration = $value;
    }