code: def config(self, llm):
      return {"llm": llm, "enable_cache": False}
  
imports: from typing import Any, Optional
  from unittest.mock import Mock
  import pandas
  import pytest
  from pandasai.llm.fake import FakeLLM
  from pandasai.pipelines.base_logic_unit import BaseLogicUnit
  from pandasai.pipelines.pipeline import Pipeline
  from pandasai.pipelines.pipeline_context import PipelineContext
  from pandasai.schemas.df_config import Config
  from pandasai.smart_dataframe import SmartDataframe
label_desc: Use image node_id 4 for calling the TestPipeline obj's underlying member method code with example usage: obj.config(llm) and returns: dict