code: def test_get_missing_metrics(self) -> None:
      expected = MissingMetrics(
          {"a": {("0_1", 1)}},
          {"b": {("0_2", 1)}},
          {"c": {("0_0", 1), ("0_1", 1), ("0_2", 1)}},
      )
      actual = get_missing_metrics(self.data, self.optimization_config)
      self.assertEqual(actual, expected)
  
imports: from copy import deepcopy
  from unittest.mock import patch
  import numpy
  import pandas
  from ax.core.arm import Arm
  from ax.core.base_trial import TrialStatus
  from ax.core.data import Data
  from ax.core.generator_run import GeneratorRun
  from ax.core.metric import Metric
  from ax.core.objective import Objective
  from ax.core.observation import ObservationFeatures
  from ax.core.optimization_config import OptimizationConfig
  from ax.core.outcome_constraint import OutcomeConstraint
  from ax.core.types import ComparisonOp
  from ax.core.utils import best_feasible_objective, extract_pending_observations, get_missing_metrics, get_missing_metrics_by_name, get_model_times, get_model_trace_of_times, get_pending_observation_features, get_pending_observation_features_based_on_trial_status, MissingMetrics
  from ax.utils.common.constants import Keys
  from ax.utils.common.testutils import TestCase
  from ax.utils.testing.core_stubs import get_experiment, get_hierarchical_search_space_experiment, get_robust_branin_experiment
  from pyre_extensions import none_throws
label_desc: Use image node_id 3 for calling the UtilsTest obj's underlying member method code with example usage: obj.test_get_missing_metrics() without return types