code: def _llm_type(self):
      return "azure"
  
file_path: SynapseML/cognitive/src/test/python/synapsemltest/services/langchain/test_LangchainTransform.py
imports: import os, json, subprocess, unittest
  from langchain.chains import LLMChain
  from langchain.prompts import PromptTemplate
  from langchain.llms import AzureOpenAI
  from synapse.ml.services.langchain import LangchainTransformer
  from synapsemltest.spark import *
label_desc: Use image node_id 1 for calling a global function with example usage: _llm_type() and returns: str