class_docstr: Constraint object for specifying one parameter to be smaller than another.
docstr: Parameter with lower value.
code: def lower_parameter(self) -> Parameter:
      """Parameter with lower value."""
      return self._lower_parameter
  
imports: from __future__ import annotations
  from typing import Dict, List, Union
  from ax.core.parameter import ChoiceParameter, FixedParameter, Parameter, RangeParameter
  from ax.core.types import ComparisonOp
  from ax.utils.common.base import SortableBase
label_desc: Use image node_id 2 for calling the OrderConstraint obj's underlying member method code with example usage: obj.lower_parameter() and returns: self