code: def check_gradio_import():
      if not GRADIO_AVAILABLE:
          msg = (
              f"could not find the gradio library.\n"
              f"****************************************************************\n"
              f"To install it, please follow the steps below:\n"
              f"pip install gradio==3.34.0\n"
          )
          raise ImportError(msg)
  
file_path: NeMo/nemo/collections/nlp/modules/common/megatron_web_server.py
imports: import asyncio
  from nemo.collections.nlp.modules.common.chat_css import CSS
  from nemo.collections.nlp.modules.common.megatron.retrieval_services.util import convert_retrieved_to_md, request_data, text_generation
label_desc: Use image node_id 1 for calling a global function with example usage: check_gradio_import() without return types