Merge pull request #246 from tsteven4/trackdata
authortsteven4 <tsteven4@users.noreply.github.com>
Sat, 1 Sep 2018 12:52:27 +0000 (06:52 -0600)
committerGitHub <noreply@github.com>
Sat, 1 Sep 2018 12:52:27 +0000 (06:52 -0600)
introduce optional class


Trivial merge