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## Description Continuing the work from @jamilsaadeh97 to replace verbose null checks with modern [null_aware_elements](https://dart.dev/tools/linter-rules/use_null_aware_elements) syntax. This PR cleans up the remaining files not covered in the previous parts, making the code more concise. ## Related PRs - https://github.com/flutter/flutter/pull/172198 - https://github.com/flutter/flutter/pull/172306 - https://github.com/flutter/flutter/pull/172307 - https://github.com/flutter/flutter/pull/172322 ## 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], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing.
Flutter gallery
An older copy of the Flutter gallery demo application used for integration testing.
For the current Flutter Gallery app sample, see this repo: https://github.com/flutter/gallery
Icon
Android launcher icons were generated using Android Asset Studio: https://romannurik.github.io/AndroidAssetStudio/icons-launcher.html#foreground.type=image&foreground.space.trim=1&foreground.space.pad=0.1&foreColor=607d8b%2C0&crop=0&backgroundShape=square&backColor=fafafa%2C100&effects=none
Video demo
The video demo is not supported on iOS simulators.