tree a3305254474e958dceac8f245cae4db03c1429cc
parent 0abb970ad13e951201bba0c557608cb7fd78d547
author Jing Bian <jingbian@google.com> 1587038464 +0200
committer Jing Bian <jingbian@google.com> 1587038464 +0200

Fix some compatibility with Dart 2.0.0.