code: def test_b_case_ignored(self):
      self._test("=?us-ascii?B?dmk=?=", "vi")
  
imports: import unittest
  from email import _encoded_words
  from email import errors
  from test.test_email import TestEmailBase
label_desc: Use image node_id 6 for calling the TestDecode obj's underlying member method code with example usage: obj.test_b_case_ignored() without return types