Backend\Modules\Analytics\Form\SettingsStepAuthConfigFileType::isValid PHP Метод

    private function isValid()
    {
        $fileField = $this->form->getField('certificate');
        $emailField = $this->form->getField('email');
        if ($fileField->isFilled(Language::err('FieldIsRequired'))) {
            $fileField->isAllowedExtension(['p12'], Language::err('P12Only'));
        }
        $emailField->isFilled(Language::err('FieldIsRequired'));
        $emailField->isEmail(Language::err('EmailIsInvalid'));
        return $this->form->isCorrect();
    }