code: def tokenizer(model_name):
      return hf_t5.T5Tokenizer.from_pretrained(model_name)
  
file_path: allennlp/tests/modules/transformer/t5_test.py
imports: import pytest
  import torch
  from transformers.models import t5
  from allennlp.modules.transformer.t5 import T5
  from allennlp.nn.parallel import FairScaleFsdpAccelerator
  from allennlp.common.testing import run_distributed_test, requires_multi_gpu
label_desc: Use image node_id 4 for calling a global function with example usage: tokenizer(model_name) and returns: hf_t5