Make previosly abstract XyzImpl classes 'sealed', and non-abstract XyzImpl classes 'final'.

Change-Id: Iec06de844e070cff940ca2dc2ea704abda30089d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/308501
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
This commit is contained in:
Konstantin Shcheglov 2023-06-10 22:20:19 +00:00 committed by Commit Queue
parent e435063e09
commit 70da08865b

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