https://api.drupal.org/api/drupal/core%21modules%21system%21tests%21modules%21image_test%21src%21Plugin%21ImageToolkit%21BrokenToolkit.php/8.9.x
BrokenToolkit.php | Drupal API
phpdrupalapi
https://api.drupal.org/api/drupal/core%21modules%21system%21tests%21modules%21image_test%21src%21Plugin%21ImageToolkit%21BrokenToolkit.php/function/BrokenToolkit%3A%3AisAvailable/9
function BrokenToolkit::isAvailable | Drupal API
functiondrupalapi