class_docstr: Constraint on the sum of parameters being greater or less than a bound.
docstr: Weights on parameters for linear constraint representation.
code: def constraint_dict(self) -> Dict[str, float]:
      """Weights on parameters for linear constraint representation."""
      return self._constraint_dict
  
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 3 for calling the SumConstraint obj's underlying member method code with example usage: obj.constraint_dict() and returns: self