code: def _config_check(config):
      # check config loading
      assert config.get("coding", None) is not None
      assert config.get("default_llm_config", None) is not None
      assert config.get("code_execution_config", None) is not None
  
      for agent_config in config["agent_configs"]:
          assert agent_config.get("name", None) is not None
          assert agent_config.get("model", None) is not None
          assert agent_config.get("description", None) is not None
          assert agent_config.get("system_message", None) is not None
  
file_path: autogen/test/agentchat/contrib/test_agent_builder.py
imports: import pytest
  import os
  import json
  import sys
  from autogen.agentchat.contrib.agent_builder import AgentBuilder
  from conftest import skip_openai
  from test_assistant_agent import OAI_CONFIG_LIST, KEY_LOC
label_desc: Use image node_id 1 for calling a global function with example usage: _config_check(config) without return types