code: def ArgMax(axis=-1):
      """Returns a layer that calculates argmax along the given axis."""
  
      def f(model_output):  # pylint: disable=invalid-name
          return jnp.argmax(model_output, axis=axis)
  
      return Fn("ArgMax", f)
  
imports: from absl import logging
  import numpy
  import tensorflow
  from trax import fastmath
  from trax.fastmath import numpy
  from trax.layers import base
  from trax.layers import initializers
  from trax.layers.assert_shape import assert_shape
  from trax.layers.base import Fn
label_desc: Use image node_id 12 for calling a global function with example usage: ArgMax(axis) and returns: Fn, jnp