Form::checkResourcesFileExistsAgent

static function checkResourcesFileExistsAgent()
{
	$polyfill = Form\Polyfill::instance();
	$resourceBooking = Form\ResourceBooking::instance();
	$app = Form\App::instance();

	if ($polyfill->checkFileExists() && $resourceBooking->checkFileExists() && $app->checkFileExists())
	{
		return '';
	}
	else
	{
		return static::class . '::rebuildResourcesAgent();';
	}
}