code: def __init__(self):
      self.initialized = False
  
file_path: transformers/examples/research_projects/rag/distributed_ray_retriever.py
imports: import logging
  import random
  import ray
  from transformers import RagConfig, RagRetriever, RagTokenizer
  from transformers.models.rag.retrieval_rag import CustomHFIndex
label_desc: Use image node_id 1 to create a new RayRetriever object  with example: obj = RayRetriever()