code: def example_variant_type(example):
      """Gets the locus field from example as a string."""
      return example.features.feature["variant_type"].int64_list.value[
          0
      ]
  
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 1 for calling a global function with example usage: example_variant_type(example) and returns: example