See :meth:`list.append()` method

        Calls observer ``self.observer(UpdateType.CREATED, item, index)`` where
        **index** is *item position*

def append(self, item):
        """
        See :meth:`list.append()` method

        Calls observer ``self.observer(UpdateType.CREATED, item, index)`` where
        **index** is *item position*
        """
        self.real_list.append(item)
        self.observer(UpdateType.CREATED, item, len(self.real_list) - 1)