code: def setUp(self) -> None:
      self.minimize_metric = Metric(name="bar", lower_is_better=True)
      self.maximize_metric = Metric(name="baz", lower_is_better=False)
      self.ambiguous_metric = Metric(name="buz")
      self.bound = 0
      self.threshold = ObjectiveThreshold(
          metric=self.maximize_metric,
          op=ComparisonOp.GEQ,
          bound=self.bound,
      )
  
imports: from unittest import mock
  from ax.core.metric import Metric
  from ax.core.outcome_constraint import CONSTRAINT_WARNING_MESSAGE, LOWER_BOUND_MISMATCH, ObjectiveThreshold, OutcomeConstraint, ScalarizedOutcomeConstraint, UPPER_BOUND_MISMATCH
  from ax.core.types import ComparisonOp
  from ax.utils.common.testutils import TestCase
label_desc: Use image node_id 1 for calling the ObjectiveThresholdTest obj's underlying member method code with example usage: obj.setUp() without return types