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It costed us about 1.2% of total analysis time. The whole information about a unit is available in its Source. R=brianwilkerson@google.com Change-Id: Iffa253d1eae1a466c10766f66c6c677e19be124a Reviewed-on: https://dart-review.googlesource.com/77220 Commit-Queue: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>