code: def to_pbtxt_file(output_path, spec):
      """Saves a spec encoded as a struct_pb2.StructuredValue in a pbtxt file."""
      spec_proto = to_proto(spec)
      dir_path = os.path.split(output_path)[0]
      tf.io.gfile.makedirs(dir_path)
      with tf.io.gfile.GFile(output_path, "wb") as f:
          f.write(text_format.MessageToString(spec_proto))
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from typing import Union
  import numpy
  import tensorflow
  import tensorflow_probability
  from tf_agents.specs import array_spec
  from tf_agents.typing import types
  from google.protobuf import text_format
  from tensorflow.core.protobuf import struct_pb2
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.saved_model import nested_structure_coder
label_desc: Use image node_id 21 for calling a global function with example usage: to_pbtxt_file(output_path, spec) without return types