code: def test_1(self):
      data = "CP_Vietnamese_VLC_v2_2022"
      DataFetcher.download_data(data, None)
  
imports: from underthesea.data_fetcher import DataFetcher
  from unittest import TestCase
label_desc: Use image node_id 1 for calling the TestDataFetcher obj's underlying member method code with example usage: obj.test_1() without return types