)]}'
{
  "commit": "8a160b1dcf99dccf8e41c2be90066ba573f72c86",
  "tree": "49bc1805934f65d530cddc7eb730e1cb07f78f9f",
  "parents": [
    "3166f063b5a8b1634667d951f21c42c5e227591d"
  ],
  "author": {
    "name": "Hao Zhu",
    "email": "haozhu233@gmail.com",
    "time": "Mon Jun 26 13:41:35 2017 -1000"
  },
  "committer": {
    "name": "Hao Zhu",
    "email": "haozhu233@gmail.com",
    "time": "Mon Jun 26 13:41:35 2017 -1000"
  },
  "message": "update docs for collapse rows.\n",
  "tree_diff": [
    {
      "type": "modify",
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      "new_path": "R/collapse_rows.R"
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