code: def srelu_fn(x):
      """Smooth relu: a smooth version of relu."""
      with tf.name_scope("srelu"):
          beta = (
              tf.Variable(20.0, name="srelu_beta", dtype=tf.float32)
              ** 2
          )
          beta = tf.cast(beta**2, x.dtype)
          safe_log = tf.math.log(
              tf.where(x > 0.0, beta * x + 1.0, tf.ones_like(x))
          )
          return tf.where(
              (x > 0.0), x - (1.0 / beta) * safe_log, tf.zeros_like(x)
          )
  
imports: from typing import Text, Tuple, Union
  import tensorflow
  import argparse
  import tensorflow.compat.v1
  from enum import Enum
  from collections import namedtuple
  from tensorflow.python.eager import tape
  from tensorflow.python.tpu import tpu_function
label_desc: Use image node_id 4 for calling a global function with example usage: srelu_fn(x) and returns: tf