As a machine, the REST API should return a list of folders contained in a Test repository

//Folder list by projectKey: /rest/raven/1.0/api/testrepository/FP/folders
{
"folders": [
  {
   "id": 6,
   "rank": 1,
   "name": "Folder1",
   "testRepositoryPath": "/Folder1"
   "folders": [],
   "testCount": 0,
   "totalTestCount": 0
  },
  {
   "id": 7,
   "rank": 2,
   "name": "Folder2",
   "testRepositoryPath": "/Folder2", // ??
   "folders": [
     {
       "id": 8,
       "rank": 1,
       "name": "Sub2",
       "testRepositoryPath": "/Folder2/Sub2", 
       "folders": [],
       "testCount": 1,
       "totalTestCount": 1
      },
      {
       ...
      }
    ],
    "testCount": 0,
    "totalTestCount": 3
   }
  ],

}