Ian Hickson 2eecb8be37 Improve Notification API (#7403)
- better documentation

- verify (at run time) that onNotification doesn't return null, and
  report copious helpful information if it does.

- add a toString/debugFillDescription convention to Notification.

- actually test Notification
2017-01-09 16:44:22 -08:00
..
2017-01-09 16:44:22 -08:00
2017-01-09 16:44:22 -08:00

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