code: def U(self):
      return c_ulonglong.in_dll(self._dll, "last_tf_arg_u").value
  
imports: import unittest
  from ctypes import *
  from ctypes.test import need_symbol
  import _ctypes_test
label_desc: Use image node_id 2 for calling the CFunctions obj's underlying member method code with example usage: obj.U() and returns: c_ulonglong