code: def getOldestVersion(self) -> str:
      if len(self.versionNames) == 0:
          return ""
      return self.versionNames[0]
  
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 40 for calling the ImageData obj's underlying member method code with example usage: obj.getOldestVersion() and returns: self, str