tree ecdfdf8533f2d1a3fc5414f6e01b1def8aa261a9
parent 5ed1c6132a1ec454db0ff1b0113a992dbfb45d1d
author Jens Johansen <jensj@google.com> 1546608663 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1546608663 +0000

Remove writeOptionalReference

References can be null --- it's written as the byte [0].
Thus in the null case it would before be [0] and now be [0].
In the non-null case it would before be [1, xyz] (1 for Tag.Something
and xyz for the actual, now positive, uint30). Now it would be [xyz].

Change-Id: Ibc08d3afb7275b0429a4d6c5e667fbd381121489
Reviewed-on: https://dart-review.googlesource.com/c/85394
Reviewed-by: Kevin Millikin <kmillikin@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>