726904ac17
Provides better typing than `catchError`. Change-Id: If0d4487b7c3a499160fb719740a1d65c0545024d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151512 Commit-Queue: Lasse R.H. Nielsen <lrn@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com> Reviewed-by: Nate Bosch <nbosch@google.com>