code: def _exportEvalSavedModel(self, classifier):
      temp_model_location = os.path.join(
          self._getTempDir(), "eval_export_dir"
      )
      _, model_location = classifier(None, temp_model_location)
      return model_location
  
file_path: model-analysis/tensorflow_model_analysis/extractors/legacy_feature_extractor_test.py
imports: import os
  import tempfile
  import numpy
  import tensorflow
  from tensorflow_model_analysis import constants
  from tensorflow_model_analysis.api import types
  from tensorflow_model_analysis.eval_saved_model import encoding
  from tensorflow_model_analysis.eval_saved_model import testutil
  from tensorflow_model_analysis.extractors import legacy_feature_extractor
label_desc: Use image node_id 2 for calling the BuildDiagnosticsTableTest obj's underlying member method code with example usage: obj._exportEvalSavedModel(classifier) and returns: model_location