code: def test_adapt_most_specific(self):
      class A:
          pass
  
      class B(A):
          pass
  
      class C(B):
          pass
  
      register_adapter(A, lambda a: AsIs("a"))
      register_adapter(B, lambda b: AsIs("b"))
      self.assertEqual(b"b", adapt(C()).getquoted())
  
imports: import string
  import ctypes
  import decimal
  import datetime
  import platform
  from .None import testutils
  import unittest
  from .testutils import ConnectingTestCase, restore_types
  from .testutils import skip_if_crdb
  import psycopg2
  from psycopg2.extensions import AsIs, adapt, register_adapter
label_desc: Use image node_id 2 for calling the AdaptSubclassTest obj's underlying member method code with example usage: obj.test_adapt_most_specific() without return types