How to use the flexmock.FlexmockContainer.get_flexmock_expectation function in flexmock

def mock_method(runtime_self, *kargs, **kwargs):
      arguments = {'kargs': kargs, 'kwargs': kwargs}
      expectation = FlexmockContainer.get_flexmock_expectation(
          self, name, arguments)
      if expectation:
        if not expectation.runnable():
          raise StateError('%s expected to be called when %s is True' %
                             (name, expectation._get_runnable()))
        expectation.times_called += 1
        expectation.verify(final=False)
        _pass_thru = _getattr(expectation, '_pass_thru')
        _replace_with = _getattr(expectation, '_replace_with')
        if _pass_thru:
          return pass_thru(expectation, runtime_self, *kargs, **kwargs)
        elif _replace_with:
          return _replace_with(*kargs, **kwargs)
        return_values = _getattr(expectation, 'return_values')
        if return_values:
          return_value = return_values[0]

def mock_method(runtime_self, *kargs, **kwargs):
      arguments = {'kargs': kargs, 'kwargs': kwargs}
      expectation = FlexmockContainer.get_flexmock_expectation(
          self, method, arguments)
      if expectation:
        expectation.times_called += 1
        if expectation._pass_thru:
          return pass_thru(expectation, *kargs, **kwargs)
        elif expectation._replace_with:
          return expectation._replace_with(*kargs, **kwargs)
        if expectation.yield_values:
          return generator_method(expectation.yield_values)
        elif expectation.return_values:
          return_value = expectation.return_values[0]
          expectation.return_values = expectation.return_values[1:]
          expectation.return_values.append(return_value)
        else:
          return_value = ReturnValue()
        if return_value.raises: