Rounds the kerning values to increments of **multiple**,
        which will be an ``int``.

        The default behavior is to round to increments of 1.

def round(self, multiple=1):
        """
        Rounds the kerning values to increments of **multiple**,
        which will be an ``int``.

        The default behavior is to round to increments of 1.
        """
        if not isinstance(multiple, int):
            raise TypeError("The round multiple must be an int not %s."
                            % multiple.__class__.__name__)
        self._round(multiple)