code: def call(self, inputs):
      return inputs, inputs
  
file_path: tensorboard/tensorboard/plugins/graph/keras_util_test.py
imports: import json
  import tensorflow
  from tensorboard.plugins.graph import keras_util
label_desc: Use image node_id 1 for calling the _DoublingLayer obj's underlying member method code with example usage: obj.call(inputs) and returns: inputs,  inputs