https://api.drupal.org/api/drupal/core%21modules%21taxonomy%21tests%21src%21Kernel%21TermHierarchyValidationTest.php/function/TermHierarchyValidationTest%3A%3AtestTermHierarchyValidation/11.x
function TermHierarchyValidationTest::testTermHierarchyValidation | Drupal API
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