def get_total_indentation(self, index):
        """Get the indentation for the given index

        :param index: the index to query
        :type index: :class:`QtCore.ModelIndex`
        :returns: the number of parents
        :rtype: int
        :raises: None
        """
        n = 0
        while index.isValid():
            n += 1
            index = index.parent()
        return n * self.indentation()