class_docstr: Unit tests for the SmartDatlake class
code: def test_load_llm_with_pandasai_llm(
      self, smart_datalake: SmartDatalake, llm
  ):
      smart_datalake._llm = None
      assert smart_datalake._llm is None
  
      smart_datalake._load_llm(llm)
      assert smart_datalake._llm == llm
  
imports: import os
  import sys
  from typing import Optional
  from unittest.mock import Mock, patch
  import pandas
  import pytest
  from pandasai import SmartDataframe, SmartDatalake
  from pandasai.connectors.base import SQLConnectorConfig
  from pandasai.connectors.sql import PostgreSQLConnector, SQLConnector
  from pandasai.helpers.code_manager import CodeManager
  from pandasai.llm.fake import FakeLLM
  from pandasai.constants import DEFAULT_FILE_PERMISSIONS
  from langchain import OpenAI
label_desc: Use image node_id 7 for calling the TestSmartDatalake obj's underlying member method code with example usage: obj.test_load_llm_with_pandasai_llm(smart_datalake, llm) without return types