class_docstr: Constraint on the sum of parameters being greater or less than a bound.
docstr: Parameters.
code: def parameters(self) -> List[Parameter]:
      """Parameters."""
      return self._parameters
  
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 SumConstraint obj's underlying member method code with example usage: obj.parameters() and returns: self