tree 7d8bc9830289804c54a88e693f6da60a836f429f
parent 4a55a88cd178e51a533a1c440eae233d0047d95b
author Lasse Reichstein Holst Nielsen <lrn@google.com> 1485862807 +0100
committer Lasse Reichstein Holst Nielsen <lrn@google.com> 1485862807 +0100

Add `peek` and `lookAhead` to `StreamQueue`.

These allow users to look at events (similar to `next` and `take`)
without consuming them. For simple cases, they can be used instead of
`startTransaction` to decide what to do before doing it.

R=nweiz@google.com

Review-Url: https://codereview.chromium.org//2649033006 .