code: def test_fill_token(self):
      tokenizer = CodeLlamaTokenizerFast.from_pretrained(
          "codellama/CodeLlama-7b-hf",
          fill_token=None,
          prefix_token=None,
          suffix_token=None,
          middle_token=None,
      )
      tokenizer.encode_plus("Hey how are you").input_ids
      tokenizer.fill_token = "<FILL_ME>"
      with self.assertRaises(ValueError):
          tokenizer.encode("Hey how <FILL_ME> are you")
          tokenizer.encode_plus("Hey how <FILL_ME> are you", "mne too")
          tokenizer.tokenize("Hey how are you", "mne too")
  
      tokenizer = CodeLlamaTokenizerFast.from_pretrained(
          "codellama/CodeLlama-7b-hf",
          revision="3773f63b4511b9e47a9a7ffc765eed7eb0169486",
      )
      tokenizer.encode("Hey how <FILL_ME> are you")
      tokenizer.encode_plus("Hey how <FILL_ME> are you", "mne too")
      tokenizer.tokenize("Hey how are you", "mne too")
  
imports: import os
  import pickle
  import shutil
  import tempfile
  import unittest
  from datasets import load_dataset
  from transformers import SPIECE_UNDERLINE, AddedToken, CodeLlamaTokenizer, CodeLlamaTokenizerFast, is_torch_available
  from transformers.convert_slow_tokenizer import convert_slow_tokenizer
  from transformers.testing_utils import get_tests_dir, nested_simplify, require_sentencepiece, require_tokenizers, require_torch, slow
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 11 for calling the LlamaIntegrationTest obj's underlying member method code with example usage: obj.test_fill_token() without return types