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930d21504a
This PR adds support for hiding the trailing icon in `DropdownMenu` widget. Currently, there's no built-in option to remove it. The change is non-breaking, as the trailing icon remains visible by default unless `showTrailingIcon` is explicitly set to `false`. The `showTrailingIcon` parameter follows a similar pattern to its use in the `ExpansionTile` widget. Fixes #164908 ## 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. --------- Co-authored-by: Qun Cheng <36861262+QuncCccccc@users.noreply.github.com>