https://api.drupal.org/api/drupal/core%21tests%21Drupal%21Tests%21Core%21Plugin%21Discovery%21DerivativeDiscoveryDecoratorTest.php/11.x
DerivativeDiscoveryDecoratorTest.php | Drupal API
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https://api.drupal.org/api/drupal/core%21tests%21Drupal%21Tests%21Core%21Plugin%21Discovery%21DerivativeDiscoveryDecoratorTest.php/function/DerivativeDiscoveryDecoratorTest%3A%3AtestGetDeriverClassWithInvalidClassedDefinitions/9
function DerivativeDiscoveryDecoratorTest::testGetDeriverClassWithInvalidClassedDefinitions |...
function