45f39fe70d
This adds support for the nnbd `?.[` operator as specified in https://github.com/dart-lang/language/pull/293/files#diff-dbeaf678924df9f8a2ca9f5d12e26d3eR11513 Change-Id: I11547cf875439fef9fe22d4f4ac5ab912b3759d1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/105902 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>