code: def close(self):
      if self.session_created:
          self.session.close()
  
imports: import math
  import random
  import sys
  import numpy
  import tensorflow
  from .sentence_grouper import SentenceGrouper
  from ..tf2contrib import *
label_desc: Use image node_id 25 for calling the NerModel obj's underlying member method code with example usage: obj.close() without return types