code: def is_train(mode):
      return mode in [KerasModeKeys.TRAIN, EstimatorModeKeys.TRAIN]
  
file_path: tensorflow-upstream/tensorflow/python/keras/saving/utils_v1/mode_keys.py
imports: import collections
label_desc: Use image node_id 3 for calling a global function with example usage: is_train(mode) and returns: unknown