code: def setUp(self):
      gt_text_sample1 = TextRecogDataSample()
      gt_text = LabelData()
      gt_text.item = "Hello"
      gt_text_sample1.gt_text = gt_text
  
      gt_text_sample2 = TextRecogDataSample()
      gt_text = LabelData()
      gt_text = LabelData()
      gt_text.item = "World1"
      gt_text_sample2.gt_text = gt_text
  
      self.data_info = [gt_text_sample1, gt_text_sample2]
  
file_path: mmocr/tests/test_models/test_textrecog/test_decoders/test_master_decoder.py
imports: import os.path
  import tempfile
  from unittest import TestCase
  import torch
  from mmengine.structures import LabelData
  from mmocr.models.textrecog.decoders import MasterDecoder
  from mmocr.structures import TextRecogDataSample
  from mmocr.testing import create_dummy_dict_file
label_desc: Use image node_id 1 for calling the TestMasterDecoder obj's underlying member method code with example usage: obj.setUp() without return types