code: def to_sonnet_module(
      transformation: types.TensorValuedCallable,
  ) -> snt.Module:
      """Convert a tensor transformation to a Sonnet Module.
  
      Args:
        transformation: A Callable that takes one or more (nested) Tensors, and
          returns one or more (nested) Tensors.
  
      Returns:
        A Sonnet Module that wraps the transformation.
      """
  
      if isinstance(transformation, snt.Module):
          return transformation
  
      module = TransformationWrapper(transformation)
  
      # Wrap the module to allow it to return an empty variable tuple.
      return snt.allow_empty_variables(module)
  
imports: import functools
  from typing import List, Optional, Union
  from acme import types
  from acme.utils import tree_utils
  import sonnet
  import tensorflow
  import tree
label_desc: Use image node_id 8 for calling a global function with example usage: to_sonnet_module(transformation) and returns: snt, transformation