1f603eb35b
* No need to give an extension a private name, without an explicit extension override. Just go unnamed. * Co-locate the two extensions on `AstNode` and on AstNode?` in analyzer package. * Combine two linter extensions on the same type, `AstNode?`. Change-Id: I88fef7d5b85bb04bf7263af3810a1c8c3b35f541 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/347652 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Auto-Submit: Samuel Rawlins <srawlins@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>