/**
* Checks access given an account, configuration mapper, and source language.
*
* Grants access if the proper permission is granted to the account, the
* configuration has translatable pieces, and the source language is not
* locked given it is present.
*
* @param \Drupal\Core\Session\AccountInterface $account
* The account to check access for.
* @param \Drupal\config_translation\ConfigMapperInterface $mapper
* The configuration mapper to check access for.
* @param \Drupal\Core\Language\LanguageInterface|null $source_language
* The source language to check for, if any.
*
* @return \Drupal\Core\Access\AccessResultInterface
* The result of the access check.
*/
protected function doCheckAccess(AccountInterface $account, ConfigMapperInterface $mapper, $source_language = NULL)
{
$access = $account->hasPermission('translate configuration') && $mapper->hasSchema() && $mapper->hasTranslatable() && (!$source_language || !$source_language->isLocked());
return AccessResult::allowedIf($access)->cachePerPermissions();
}
