code: def call(self, x, training=False):
      x = self.conv(x)
      x = self.norm(x, training=training)
      return x
  
imports: import numpy
  import tensorflow
  from tensorflow.keras import layers, initializers, Model
label_desc: Use image node_id 2 for calling the Stem obj's underlying member method code with example usage: obj.call(x, training) and returns: x