Documentation for WebDriverTestBase gives wrong base class

API page: https://api.drupal.org/api/drupal/core%21tests%21Drupal%21FunctionalJava...

The documentation says (at the top of the page, under Hierarchy):

class \Drupal\Tests\BrowserTestBase extends \PHPUnit\Framework\TestCase

... but the source code says:

abstract class WebDriverTestBase extends BrowserTestBase { ... }