code: def createTestImageData(self) -> ImageData:
      name = "6667571"
      fileName = "6667571.dcm"
      nodeName = "6667571.dcm"
      checkSum = "SHA256:2a454e9ab8a33dc74996784163a362a53e04adcee2fd73a8b6299bf0ce5060d3"
      isSegmented = True
      timeStamp = 1639647550
      comment = "test-comment"
  
      imageData = ImageData(
          name=name,
          fileName=fileName,
          nodeName=nodeName,
          checkSum=checkSum,
          segmented=isSegmented,
          timeStamp=timeStamp,
          comment=comment,
      )
  
      # imageData.addNewSegmentationMeta(status="flagged", level="hard", approvedBy="Dr.Faust", comment="Damit ich erkenne, was die Menchenwelt im Innerstern zusammenhaelt")
      imageData.setSegmentationFileName("6662775.seg.nrrd")
      imageData.setClientId("segmentator")
      imageData.setVersionNames(["final", "version_1", "version_2"])
  
      segMeta_final = self.createSegMeta(
          status="flagged",
          level="hard",
          approvedBy="annotator",
          comment="Errare humanum est",
          editTime="Thu Jan 13 12:21:01 2022",
      )
      segMeta_version1 = self.createSegMeta(
          status="flagged",
          level="medium",
          approvedBy="radiologist_1",
          comment="Irren ist menschlisch",
          editTime="Thu Jan 14 12:21:01 2022",
      )
      segMeta_version2 = self.createSegMeta(
          status="flagged",
          level="easy",
          approvedBy="radiologist_2",
          comment="Menschlische Gebrechen sühnet reine Menschlichkeit",
          editTime="Thu Jan 15 12:21:01 2022",
      )
  
      segmentationMetaDict = {}
      segmentationMetaDict["final"] = segMeta_final
      segmentationMetaDict["version_1"] = segMeta_version1
      segmentationMetaDict["version_2"] = segMeta_version2
  
      imageData.setSegmentationMetaDict(segmentationMetaDict)
  
      return imageData
  
imports: import json
  import os
  import sys
  import unittest
  from MONAILabelReviewerLib.ImageData import ImageData
  from MONAILabelReviewerLib.JsonParser import JsonParser
  from MONAILabelReviewerLib.SegmentationMeta import SegmentationMeta
label_desc: Use image node_id 4 for calling the ImageDataTest obj's underlying member method code with example usage: obj.createTestImageData() and returns: imageData