How to use the flexmock.MethodSignatureError function in flexmock

args_len = len(allowed.args)
    if is_method:
      args_len -= 1
    minimum = args_len - (allowed.defaults and len(allowed.defaults) or 0)
    maximum = None
    if allowed.varargs is None and allowed.keywords is None:
      maximum = args_len
    total_positional = len(
        kargs + tuple(a for a in kwargs if a in allowed.args))
    named_optionals = [a for a in kwargs
        if allowed.defaults
        if a in allowed.args[len(allowed.args) - len(allowed.defaults):]]
    if allowed.defaults and total_positional == minimum and named_optionals:
      minimum += len(named_optionals)
    if total_positional < minimum:
      raise MethodSignatureError(
          '%s requires at least %s arguments, expectation provided %s' %
          (self.name, minimum, total_positional))
    if maximum is not None and total_positional > maximum:
      raise MethodSignatureError(
          '%s requires at most %s arguments, expectation provided %s' %
          (self.name, maximum, total_positional))
    if args_len == len(kargs) and any(a for a in kwargs if a in allowed.args):
      raise MethodSignatureError(
          '%s already given as positional arguments to %s' %
          ([a for a in kwargs if a in allowed.args], self.name))
    if (not allowed.keywords and
        any(a for a in kwargs if a not in allowed.args + allowed.kwonlyargs)):
      raise MethodSignatureError(
          '%s is not a valid keyword argument to %s' %
          ([a for a in kwargs
            if a not in (allowed.args + allowed.kwonlyargs)][0], self.name))

if return_value.raises:
          if _isclass(return_value.raises):
            raise return_value.raises(
                *return_value.value['kargs'], **return_value.value['kwargs'])
          else:
            raise return_value.raises
        else:
          return return_value.value
      else:
        # make sure to clean up expectations to ensure none of them
        # interfere with the runner's error reporing mechanism
        # e.g. open()
        for _, expectations in FlexmockContainer.flexmock_objects.items():
          for expectation in expectations:
            _getattr(expectation, 'reset')()
        raise MethodSignatureError(_format_args(name, arguments))

original = _getattr(expectation, 'original')
        _mock = _getattr(expectation, '_mock')
        if _isclass(_mock):
          if type(original) in SPECIAL_METHODS:
            original = _getattr(expectation, 'original_function')
            return_values = original(*kargs, **kwargs)
          else:
            return_values = original(runtime_self, *kargs, **kwargs)
        else:
          return_values = original(*kargs, **kwargs)
      except:
        return _handle_exception_matching(expectation)
      expected_values = _getattr(expectation, 'return_values')
      if (expected_values and
          not match_return_values(expected_values[0].value, return_values)):
        raise (MethodSignatureError('expected to return %s, returned %s' %
               (expected_values[0].value, return_values)))
      return return_values