code: def test_initialized_attributes_allowed_after_seal(self):
      m = mock.Mock(test_value=1)
  
      mock.seal(m)
      self.assertEqual(m.test_value, 1)
  
imports: import unittest
  from unittest import mock
label_desc: Use image node_id 7 for calling the TestSealable obj's underlying member method code with example usage: obj.test_initialized_attributes_allowed_after_seal() without return types