code: def set_disambig_retriv(self, **kwargs):
      params = (
          {"llm_kwargs": kwargs["disambig_llm_kwargs"]}
          if kwargs.get("disambig_llm_kwargs", None)
          else {}
      )
      self.llm_chain_disambiguate = LLMChain(
          llm=self.llm, prompt=kwargs["disambig_prompt"], **params
      )
  
      def disambiguity(input: str):
          out = self.llm_chain_disambiguate.run(
              input=input, chat_history=self.memory.buffer, stop=["\n"]
          )
          return out.split("\n")[0]
  
      self.info_retriever.set_rephrase_handler(disambiguity)
  
imports: import os
  from typing import Dict, Tuple
  from colossalqa.chain.retrieval_qa.base import RetrievalQA
  from colossalqa.data_loader.document_loader import DocumentLoader
  from colossalqa.memory import ConversationBufferWithSummary
  from colossalqa.mylogging import get_logger
  from colossalqa.prompt.prompt import PROMPT_DISAMBIGUATE_ZH, PROMPT_RETRIEVAL_QA_ZH, SUMMARY_PROMPT_ZH, ZH_RETRIEVAL_QA_REJECTION_ANSWER, ZH_RETRIEVAL_QA_TRIGGER_KEYWORDS
  from colossalqa.retriever import CustomRetriever
  from langchain import LLMChain
  from langchain.embeddings import HuggingFaceEmbeddings
label_desc: Use image node_id 7 for calling the RAG_ChatBot obj's underlying member method code with example usage: obj.set_disambig_retriv() and returns: out