code: def _unpickle_proto(name, serialized_proto):
      return _PROTO_CLS_BY_NAME[name].FromString(serialized_proto)
  
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 2 for calling a global function with example usage: _unpickle_proto(name, serialized_proto) and returns: _PROTO_CLS_BY_NAME