code: def __call__(
      self,
      prompt: Union[str, OpenAICreateChatPrompt],
      **kwargs,
  ) -> OpenAIChatCompletionResult:
      if not isinstance(prompt, Prompt):
          assert (
              isinstance(prompt, str)
              or (
                  isinstance(prompt, list)
                  and all(isinstance(token, int) for token in prompt)
              )
              or (
                  isinstance(prompt, list)
                  and all(isinstance(token, str) for token in prompt)
              )
              or (
                  isinstance(prompt, list)
                  and all(isinstance(msg, dict) for msg in prompt)
              )
          ), f"Got type {type(prompt)}, with val {type(prompt[0])} for prompt, expected str or list[int] or list[str] or list[dict[str, str]]"
  
          prompt = ChatCompletionPrompt(
              raw_prompt=prompt,
          )
  
      openai_create_prompt: OpenAICreateChatPrompt = (
          prompt.to_formatted_prompt()
      )
  
      result = openai_chat_completion_create_retrying(
          OpenAI(api_key=self.api_key, base_url=self.api_base),
          model=self.model,
          messages=openai_create_prompt,
          **{**kwargs, **self.extra_options},
      )
      result = OpenAIChatCompletionResult(
          raw_data=result, prompt=openai_create_prompt
      )
      record_sampling(
          prompt=result.prompt, sampled=result.get_completions()
      )
      return result
  
imports: from typing import Any, Optional, Union
  from openai import OpenAI
  from evals.api import CompletionFn, CompletionResult
  from evals.base import CompletionFnSpec
  from evals.prompt.base import ChatCompletionPrompt, CompletionPrompt, OpenAICreateChatPrompt, OpenAICreatePrompt, Prompt
  from evals.record import record_sampling
  from evals.utils.api_utils import openai_chat_completion_create_retrying, openai_completion_create_retrying
label_desc: Use image node_id 2 for calling the OpenAIChatCompletionFn obj's underlying member method code with example usage: obj.__call__(prompt) and returns: result