Fill missing code samples

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (5a48d5e) 82.84% compared to head (9f6773c) 82.84%. Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #354 +/- ## ======================================= Coverage 82.84% 82.84% ======================================= Files 48 48 Lines 1218 1218 ======================================= Hits 1009 1009 Misses 209 209 ```

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[meili-bors[bot]]

Build succeeded:

• integration-tests (dart 3.0.0)
• linter-check
• pana