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## Description The DecoratedSliver sample was showing an antialiasing gap between two adjacent slivers when scrolling on desktop platforms (as reported in #166822). The fix uses a single `DecoratedSliver` wrapping a `SliverMainAxisGroup` instead of two separate `DecoratedSliver` widgets. This eliminates the gap while still demonstrating the widget effectively. Fixes https://github.com/flutter/flutter/issues/166822 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] All existing and new tests are passing. [Contributor Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/master/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/master/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [](https://www.talabat.com) [](https://github.com/search?q=org%3Aflutter+talabat&type=pullrequests)