private void initTaskMap(String taskType, int taskIndex) {
    if (!_taskMap.containsKey(taskType)) {
      _taskMap.put(taskType, new HashMap<>());
    }

    if (!_taskMap.get(taskType).containsKey(taskIndex)) {
      _taskMap.get(taskType).put(taskIndex, new TonyTaskData(taskType, taskIndex));
    }
  }
Returns a map of task data.
@return  a map from task type to a map of task index to task data
app/com/linkedin/drelephant/tony/data/TonyApplicationData.java