Apply `#[\Override]` attribute on methods extended (#472)
* Apply #[\Override] attribute on methods extended
Co-Authored-By: Deeka Wong <8337659+huangdijia@users.noreply.github.com>
* Add #[Override] attribute to fetch() method
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Co-authored-by: Deeka Wong <8337659+huangdijia@users.noreply.github.com>