Prado\Web\UI\ActiveControls\TActiveCustomValidator::setErrorMessage PHP Метод

    public function setErrorMessage($value)
    {
        if (parent::getErrorMessage() === $value) {
            return;
        }
        parent::setErrorMessage($value);
        if ($this->getActiveControl()->canUpdateClientSide()) {
            $client = $this->getPage()->getCallbackClient();
            $func = 'Prado.Validation.setErrorMessage';
            $client->callClientFunction($func, array($this, $value));
        }
    }