code: def example_variant(example):
      """Gets and decodes the variant field from example as a Variant."""
      encoded = example.features.feature[
          "variant/encoded"
      ].bytes_list.value[0]
      return variants_pb2.Variant.FromString(encoded)
  
imports: import json
  from typing import Optional
  from absl import logging
  import numpy
  import tensorflow
  from deepvariant.protos import deepvariant_pb2
  from third_party.nucleus.io import sharded_file_utils
  from third_party.nucleus.io import tfrecord
  from third_party.nucleus.protos import variants_pb2
  from tensorflow.core.example import example_pb2
label_desc: Use image node_id 6 for calling a global function with example usage: example_variant(example) and returns: variants_pb2