code: def setUp(self) -> None:
      self.constraint = ParameterConstraint(
          constraint_dict={"x": 2.0, "y": -3.0}, bound=6.0
      )
      self.constraint_repr = (
          "ParameterConstraint(2.0*x + -3.0*y <= 6.0)"
      )
  
imports: from ax.core.parameter import ChoiceParameter, FixedParameter, ParameterType, RangeParameter
  from ax.core.parameter_constraint import ComparisonOp, OrderConstraint, ParameterConstraint, SumConstraint
  from ax.utils.common.testutils import TestCase
label_desc: Use image node_id 1 for calling the ParameterConstraintTest obj's underlying member method code with example usage: obj.setUp() without return types