code: def decode(proto_str):
      """Decodes a proto string."""
  
      return proto_str.decode("utf-8")
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import functools
  import os
  from absl.testing import parameterized
  from adanet import tf_compat
  from adanet.core import testing_utils
  from adanet.core.summary import _ScopedSummary
  from adanet.core.summary import _TPUScopedSummary
  from adanet.core.summary import monkey_patched_summaries
  from six.moves import range
  import tensorflow.compat.v1
  from tensorflow.python.ops import summary_ops_v2
label_desc: Use image node_id 1 for calling a global function with example usage: decode(proto_str) and returns: proto_str