code: def test_getTimeStamp(self):
      name = self.jsonParser.getTimeStamp(
          self.json_without_segmentation
      )
      self.assertEqual(name, 1642371057)
  
imports: import json
  import os
  import sys
  import unittest
  from MONAILabelReviewerLib.ImageData import ImageData
  from MONAILabelReviewerLib.JsonParser import JsonParser
label_desc: Use image node_id 6 for calling the JsonParserTest obj's underlying member method code with example usage: obj.test_getTimeStamp() without return types