code: def init(self):
      self.groupImageDataByClientId()
      self.extractAllReviewers()
      self.extractNotSegmentedImageIds()
  
imports: import datetime
  import logging
  from typing import Dict, List
  from MONAILabelReviewerLib.ImageData import ImageData
  from MONAILabelReviewerLib.MONAILabelReviewerEnum import Level
label_desc: Use image node_id 2 for calling the ImageDataExtractor obj's underlying member method code with example usage: obj.init() without return types