tree 0329098e774ccd78b4a400a49b13631028cd6c56
parent 3855d17952d1fcce5b88045d46253e8eb8b30f5d
author danzh <danzh@google.com> 1555624535 -0700
committer Copybara-Service <copybara-worker@google.com> 1555624564 -0700

gfe-relnote: n/a(test only code) switch from unordered_set to multimap.

The order of elements in std::unordered_set is not consistent in different
platforms. However, the existing test requires the order of the elements to be
sorted according to key.

PiperOrigin-RevId: 244264305
Change-Id: I9f45e5b95d3ec17d68ff9bb95f1a34e4b398b900