code: def setUpClass(cls):
      AbstractTkTest.setUpClass.__func__(cls)
      cls.testfile = support.findfile(
          "python.xbm", subdir="tkinterdata"
      )
  
imports: import unittest
  import tkinter
  from test import support
  from test.support import os_helper
  from test.test_tkinter.support import AbstractTkTest, AbstractDefaultRootTest, requires_tk
label_desc: Use image node_id 1 for calling the BitmapImageTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types