code: def formatTimeStamp(self, timeStamp) -> str:
      if type(timeStamp) == str:
          return timeStamp
      return str(datetime.fromtimestamp(timeStamp))
  
imports: import logging
  from datetime import datetime
  from typing import Dict, List
  from MONAILabelReviewerLib.MONAILabelReviewerEnum import SegStatus
  from MONAILabelReviewerLib.SegmentationMeta import SegmentationMeta
label_desc: Use image node_id 11 for calling the ImageData obj's underlying member method code with example usage: obj.formatTimeStamp(timeStamp) and returns: str, timeStamp