code: def look_up_feature(
      feature_name: types.FeatureName,
      container: Iterable[schema_pb2.Feature],
  ) -> Optional[schema_pb2.Feature]:
      """Returns a feature if it is found in the specified container."""
      for f in container:
          if f.name == feature_name:
              return f
      return None
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import logging
  from typing import Any, Iterable, List, Mapping, Optional, Set, Text, Tuple, Union
  from tensorflow_data_validation import types
  from tensorflow_data_validation.utils import io_util
  from google.protobuf import descriptor
  from google.protobuf import text_format
  from tensorflow_metadata.proto.v0 import schema_pb2
label_desc: Use image node_id 12 for calling a global function with example usage: look_up_feature(feature_name, container) and returns: None, f