Improve docs for switchMap (dart-lang/stream_transform#109)

- Expand the docs for `switchMap` and add caveats.
- Crosslink between `switchMap` and `concurrentAsyncMap`.
- Add test for erroring convert callback in `switchMap`
5 files changed
tree: 263155910a9486998b7eeb6973ecdfe891989105
  1. pkgs/