code: def get_input_output_texts(self, tokenizer):
      input_text = "This is a là test"
      output_text = "This is a<unk><unk> test"
      return input_text, output_text
  
file_path: transformers/tests/models/bartpho/test_tokenization_bartpho.py
imports: import os
  import unittest
  from transformers.models.bartpho.tokenization_bartpho import VOCAB_FILES_NAMES, BartphoTokenizer
  from transformers.testing_utils import get_tests_dir
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 3 for calling the BartphoTokenizerTest obj's underlying member method code with example usage: obj.get_input_output_texts(tokenizer) and returns: input_text,  output_text