code: def get_input_output_texts(self, tokenizer):
      return ("This is a test", "This is a test")
  
imports: import unittest
  from transformers import PegasusTokenizer, PegasusTokenizerFast
  from transformers.testing_utils import get_tests_dir, require_sentencepiece, require_tokenizers, require_torch, slow
  from transformers.utils import cached_property
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 4 for calling the PegasusTokenizationTest obj's underlying member method code with example usage: obj.get_input_output_texts(tokenizer) and returns: str,  str