code: def contain_negatives(self):
      if self._implicit_negative and self._num_negatives is None:
          return False
      else:
          return True
  
imports: import multiprocessing
  import tensorflow
  import numpy
  import random
label_desc: Use image node_id 2 for calling the _DataStore obj's underlying member method code with example usage: obj.contain_negatives() and returns: False, True