https://api.drupal.org/api/drupal/core%21tests%21Drupal%21KernelTests%21Core%21File%21DirectoryTest.php/class/DirectoryTest/8.9.x
class DirectoryTest | Drupal API
classdrupalapi
https://api.drupal.org/api/drupal/core%21tests%21Drupal%21KernelTests%21Core%21File%21DirectoryTest.php/9
DirectoryTest.php | Drupal API
phpdrupalapi
https://api.drupal.org/api/drupal/core%21tests%21Drupal%21KernelTests%21Core%21File%21DirectoryTest.php/function/DirectoryTest%3A%3AtestFileCheckDirectoryHandling/10
function DirectoryTest::testFileCheckDirectoryHandling | Drupal API
functiondrupalapi