Access checking on routes page needs editing

I am reporting https://www.drupal.org/node/2122195 to moderators because on this page it says:

Sometimes just relying on permissions and/or roles is not sufficient and you need to do custom access checking on routes. To achieve this, implement a class with AccessCheckInterface and use that to check access.

However the provided example does not implement anything. I looked at several examples in core and they seem to all use implements AccessInterface. So does this mean there is a typo here.

If it should in fact AccessInterface, there is one more issue. AccessInterface seems to be redundant now:

/**
 * @file
 * Contains \Drupal\Core\Routing\Access\AccessInterface.
 */

namespace Drupal\Core\Routing\Access;

/**
 * An access check service determines access rules for particular routes.
 */
interface AccessInterface {

  // @todo Remove this interface since it no longer defines any methods?
  // @see https://drupal.org/node/2266817.

}

Remaining tasks

• Extend example to implement AccessInterface
• Rewrite example once AccessInterface is redundant (but see #2266817: Deprecate empty AccessInterface and remove usages