Nullable types must be explicit

beloglazov91 → changed the visibility of the branch 3509308-nullable-types-must to hidden.

liam morland → made their first commit to this issue’s fork.

I added one more explicit null declaration and tests now pass on max PHP. I have reviewed the other commit and I agree that it is the correct change.

Looks good (i've looked at a lot of these lol) and works, thank you! As noted already in the issue summary there are no compatibility concerns given Drupal core's minimum PHP requirements.

Uploading stable patch file for composer patches.

Rerolled patch for 1.12.