code: def test_MergeModelPredict(self) -> None:
      mu_append = {"m1": [0.6], "m2": [0.7]}
      cov_append = {
          "m1": {"m1": [0.0], "m2": [0.0]},
          "m2": {"m1": [0.0], "m2": [0.0]},
      }
      merged_predicts = merge_model_predict(
          self.predict, (mu_append, cov_append)
      )
      self.assertEqual(len(merged_predicts[0]["m1"]), 3)
  
file_path: Ax/ax/core/tests/test_types.py
imports: from ax.core.types import merge_model_predict, validate_evaluation_outcome, validate_floatlike, validate_map_dict, validate_param_value, validate_parameterization, validate_single_metric_data, validate_trial_evaluation
  from ax.utils.common.testutils import TestCase
label_desc: Use image node_id 2 for calling the TypesTest obj's underlying member method code with example usage: obj.test_MergeModelPredict() without return types