docstr: Simple module that squares an input.
docstr_tok: ["Simple","module","that","squares","an","input","."]
code: def _stateless_module_fn(self):
      """Simple module that squares an input."""
      x = tf.compat.v1.placeholder(tf.int64)
      y = x * x
      hub.add_signature(inputs=x, outputs=y)
  
file_path: hub/tensorflow_hub/e2e_test.py
imports: import os
  import tarfile
  from absl import logging
  import tensorflow
  import tensorflow_hub
  from tensorflow_hub import test_utils
label_desc: Use image node_id 2 for calling the End2EndTest obj's underlying member method code with example usage: obj._stateless_module_fn() without return types