code: def setup_tokenizer(llama_tokenizer):
      def _helper(tokenizer_mock):
          # Align with Llama 2 tokenizer
          tokenizer_mock.from_pretrained.return_value = llama_tokenizer
  
      return _helper
  
imports: import pytest
  from transformers import LlamaTokenizer
label_desc: Use image node_id 2 for calling a global function with example usage: setup_tokenizer(llama_tokenizer) and returns: _helper