API page: https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Datetime%...
Enter a descriptive title (above) relating to class DrupalDateTime, then describe the problem you have found:
> * @see \Drupal/Component/Datetime/DateTimePlus.php
The slashes can't decide which way they're going!
Also, typically we link to code components such as classes, methods, or functions, rather than files.