https://api.drupal.org/api/drupal/core%21modules%21node%21tests%21src%21Kernel%21NodeTypeValidationTest.php/class/hierarchy/NodeTypeValidationTest/11.x
NodeTypeValidationTest | Drupal API
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https://api.drupal.org/api/drupal/core%21modules%21node%21tests%21src%21Kernel%21NodeTypeValidationTest.php/function/NodeTypeValidationTest%3A%3AtestPreviewModeValidation/11.x
function NodeTypeValidationTest::testPreviewModeValidation | Drupal API
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