code: def to_dict(self) -> Dict[str, Any]:
      ...
  
file_path: haystack/haystack/dataclasses/answer.py
imports: import io
  from typing import Any, Dict, List, Optional, Protocol, runtime_checkable
  from dataclasses import dataclass, field, asdict
  from pandas import DataFrame, read_json
  from haystack.core.serialization import default_from_dict, default_to_dict
  from haystack.dataclasses.document import Document
label_desc: Use image node_id 1 for calling the Answer obj's underlying member method code with example usage: obj.to_dict() without return types