code: def test_getNodeName(self):
      name = self.jsonParser.getNodeName(self.json_without_segmentation)
      self.assertEqual(name, "6245968.dcm")
  
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 4 for calling the JsonParserTest obj's underlying member method code with example usage: obj.test_getNodeName() without return types