code: def _replace_none_batch(x, batch_size=None):
      if batch_size is None:
          return x
      if isinstance(x, tf.Tensor) and x.shape[0] is None:
          x.set_shape([batch_size] + x.shape[1:])
          return x
      elif isinstance(x, tf.TensorShape) and x[0] is None:
          return [batch_size] + x[1:]
      return x
  
file_path: trax/trax/trax2keras.py
imports: import functools
  import tensorflow.compat.v2
  from trax import fastmath
  from trax import shapes
  from trax.fastmath import numpy
  from trax.layers import base
label_desc: Use image node_id 1 for calling a global function with example usage: _replace_none_batch(x, batch_size) and returns: x, x, x, unknown