code: def round(self, multiple=1):
          
          if not isinstance(multiple, int):
              raise TypeError("The round multiple must be an int not %s."
                              % multiple.__class__.__name__)
          self._round(multiple)
docs: Rounds the kerning values to increments of **multiple**,
          which will be an ``int``.
  
          The default behavior is to round to increments of 1.