code: def test_Sortable(self) -> None:
      constraint1 = ParameterConstraint(
          constraint_dict={"x": 2.0, "y": -3.0}, bound=1.0
      )
      constraint2 = ParameterConstraint(
          constraint_dict={"y": -3.0, "x": 2.0}, bound=6.0
      )
      self.assertTrue(constraint1 < constraint2)
  
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 8 for calling the ParameterConstraintTest obj's underlying member method code with example usage: obj.test_Sortable() without return types