code: def call(self, x):
      if self.process is None:
          return x
      return self.process(x)
  
imports: import tensorflow
  from tensorflow.keras import Model, Sequential
  from tensorflow.keras.layers import AveragePooling2D, BatchNormalization, Conv2D, Dense, Dropout, GlobalAveragePooling2D, MaxPool2D, ReLU, SeparableConv2D
  from nni.nas.tensorflow.mutables import InputChoice, LayerChoice, MutableScope
label_desc: Use image node_id 3 for calling the Calibration obj's underlying member method code with example usage: obj.call(x) and returns: self, x