https://api.drupal.org/api/drupal/core%21modules%21system%21tests%21src%21Functional%21Form%21RebuildTest.php/function/RebuildTest%3A%3AsetUp/8.9.x
function RebuildTest::setUp | Drupal API
functionsetupdrupalapi
https://api.drupal.org/api/drupal/core%21modules%21system%21tests%21src%21FunctionalJavascript%21Form%21RebuildTest.php/function/RebuildTest%3A%3AtestPreserveFormActionAfterAJAX/9
function RebuildTest::testPreserveFormActionAfterAJAX | Drupal API
functiondrupalapi