code: def simple_fake_test(handler):
      from langchain.chains import LLMChain
      from langchain.llms.fake import FakeListLLM
      from langchain.prompts import PromptTemplate
  
      llm = FakeListLLM(
          responses=[f"Fake response: {i}" for i in range(100)]
      )
  
      prompt = PromptTemplate(
          input_variables=["product"],
          template="What is a good name for a company that makes {product}?",
      )
  
      chain = LLMChain(llm=llm, prompt=prompt, callbacks=[handler])
  
      for i in range(10):
          chain(f"q: {i} - {datetime.datetime.now().timestamp()}")
  
label_desc: Use image node_id 1 for calling a global function with example usage: simple_fake_test(handler) without return types