Order::checkModules

private function checkModules()
{
	if (!MainLoader::includeModule('crm'))
	{
		$this->addError(new MainError('module "crm" is not installed.'));
		return false;
	}
	if (!MainLoader::includeModule('catalog'))
	{
		$this->addError(new MainError('module "catalog" is not installed.'));
		return false;
	}
	if (!MainLoader::includeModule('sale'))
	{
		$this->addError(new MainError('module "sale" is not installed.'));
		return false;
	}

	return true;
}