code: def _makeEvalConfig(self):
      eval_config = config_pb2.EvalConfig(
          model_specs=[
              config_pb2.ModelSpec(example_weight_key="testing_key")
          ]
      )
      return eval_config
  
imports: import os
  import tensorflow
  from tensorflow_model_analysis import constants
  from tensorflow_model_analysis.eval_saved_model import testutil
  from tensorflow_model_analysis.proto import config_pb2
  from tensorflow_model_analysis.proto import metrics_for_slice_pb2
  from tensorflow_model_analysis.slicer.slicer_lib import OVERALL_SLICE_NAME
  from tensorflow_model_analysis.slicer.slicer_lib import SingleSliceSpec
  from tensorflow_model_analysis.view import util
  from tensorflow_model_analysis.view import view_types
  from google.protobuf import text_format
label_desc: Use image node_id 4 for calling the UtilTest obj's underlying member method code with example usage: obj._makeEvalConfig() and returns: eval_config