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add null safety guide to readme (#299)

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2021-03-19 08:20:13 +08:00
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packages/pigeon/README.md
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@ -110,6 +110,12 @@ public interface Api2Host {
}
```
## Null Safety (NNBD)
In order to generate null-safe code run the command line with the extra argument
`--dart_null_safety`. For example:
`flutter pub run pigeon --input ./pigeons/messages.dart --dart_null_safety`.
## Feedback
File an issue in [flutter/flutter](https://github.com/flutter/flutter) with the