code: def test_vocab_size(self):
      self.assertEqual(self.get_tokenizer().vocab_size, 78)
  
imports: import unittest
  from transformers.models.fastspeech2_conformer import FastSpeech2ConformerTokenizer
  from transformers.testing_utils import require_g2p_en, slow
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 6 for calling the FastSpeech2ConformerTokenizerTest obj's underlying member method code with example usage: obj.test_vocab_size() without return types