Hixie babba2f0ec Make Route.build() arguments match RouteBuilder()
Assert at build time that PageRoute route builders do not return null
widget trees.

Also very minor new code comments and code reorg to help make the heroes
patch easier to review.

(These are changes that are unrelated to Heroes but that were part of
the Heroes patch.)
2015-10-21 11:33:44 -07:00
..
2015-10-21 11:13:12 -07:00

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