code: def isBlank(self, string) -> bool:
      return not (string and string.strip())
  
imports: import logging
  import time
  from MONAILabelReviewerLib.MONAILabelReviewerEnum import Label
label_desc: Use image node_id 19 for calling the SegmentationMeta obj's underlying member method code with example usage: obj.isBlank(string) and returns: unknown