Select the correct update method when updating a stack.

        Args:
            force_interactive (str): Whether or not to force interactive mode
                no matter what mode the provider is in.
            force_change_set (bool): Whether or not to force change set use.

        Returns:
            function: The correct object method to use when updating.

def select_update_method(self, force_interactive, force_change_set):
        """Select the correct update method when updating a stack.

        Args:
            force_interactive (str): Whether or not to force interactive mode
                no matter what mode the provider is in.
            force_change_set (bool): Whether or not to force change set use.

        Returns:
            function: The correct object method to use when updating.
        """
        if self.interactive or force_interactive:
            return self.interactive_update_stack
        elif force_change_set:
            return self.noninteractive_changeset_update
        else:
            return self.default_update_stack