code: def _pickle_proto(proto):
      return _unpickle_proto, (
          proto.DESCRIPTOR.name,
          proto.SerializeToString(),
      )
  
file_path: transform/tensorflow_transform/pickle_helper.py
imports: import copyreg
  import tensorflow
  from tensorflow_transform import common
  from tensorflow_metadata.proto.v0 import schema_pb2
  from tensorflow_metadata.proto.v0 import statistics_pb2
label_desc: Use image node_id 1 for calling a global function with example usage: _pickle_proto(proto) and returns: _unpickle_proto,  proto,  proto