code: def data(self) -> str:
      return self._data
  
imports: from __future__ import annotations
  import json
  from types import TracebackType
  from typing import TYPE_CHECKING, Any, Generic, TypeVar, Iterator, AsyncIterator, cast
  from typing_extensions import Self, override
  import httpx
  from ._utils import is_mapping
  from ._exceptions import APIError
label_desc: Use image node_id 5 for calling the ServerSentEvent obj's underlying member method code with example usage: obj.data() and returns: self