https://api.drupal.org/api/drupal/core%21modules%21system%21tests%21src%21Unit%21FileTransfer%21FileTransferTest.php/property/FileTransferTest%3A%3AtestConnection/11.x
FileTransferTest::$testConnection | Drupal API
drupalapi
https://api.drupal.org/api/drupal/core%21modules%21system%21tests%21src%21Functional%21FileTransfer%21FileTransferTest.php/class/FileTransferTest/8.9.x
class FileTransferTest | Drupal API
classdrupalapi