I will move part 1 to part 3 to a separate bug because these three patches don't change the behavior and just improve the readability. So we can land them first.
Bug 1805727 Comment 19 Edit History
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I will move part 1 to part 3 to a separate bug (Bug 1831981) because these three patches don't change the behavior and just improve the readability. So we can land them first.