code: def test_transparency(self):
      image = self.create()
      self.assertEqual(image.transparency_get(0, 0), True)
      self.assertEqual(image.transparency_get(4, 6), False)
      image.transparency_set(4, 6, True)
      self.assertEqual(image.transparency_get(4, 6), True)
      image.transparency_set(4, 6, False)
      self.assertEqual(image.transparency_get(4, 6), False)
  
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 28 for calling the PhotoImageTest obj's underlying member method code with example usage: obj.test_transparency() without return types