code: def _context_feature_columns():
      return {
          name: tf.feature_column.numeric_column(
              name, shape=(1,), default_value=0.0
          )  # pylint: disable=g-deprecated-tf-checker
          for name in ["c1"]
      }
  
imports: import os
  from absl.testing import parameterized
  import six
  import tensorflow
  from tensorflow import estimator
  from google.protobuf import text_format
  from tensorflow_ranking.python import data
  from tensorflow_ranking.python import estimator
  from tensorflow_ranking.python import feature
  from tensorflow_serving.apis import input_pb2
label_desc: Use image node_id 5 for calling a global function with example usage: _context_feature_columns() and returns: unknown