Sergey Biryukov df724f991b Code Modernization: Silence the deprecation warnings for missing return type in WP_Theme. ...

This fixes the "Deprecated: Return type of `WP_Theme::[METHODNAME]($offset)` should be compatible with `ArrayAccess::[METHODNAME](): type`" warnings on PHP 8.1.

PHP native interfaces now have declared return types and methods in classes implementing these interfaces need to either have the return type declared (in a covariant compatible manner with the PHP native interface method declaration), or need to silence the deprecation warning using the `#[ReturnTypeWillChange]` attribute.

Follow-up to [51517].

Props jrf.
See #53635.

git-svn-id: https://develop.svn.wordpress.org/trunk@51529 602fd350-edb4-49c9-b593-d223f7449a82

2021-08-02 22:30:04 +00:00

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