Sets the current track position in microseconds.

        :param str track_id: The currently playing track's identifier.
        :param int position: Track position in microseconds.
                             This must be between 0 and <track_length>.

        If the Position argument is less than 0, do nothing.
        If the Position argument is greater than the track length, do nothing.
        If the CanSeek property is false, this has no effect.

def SetPosition(self, track_id, position):
        """Sets the current track position in microseconds.

        :param str track_id: The currently playing track's identifier.
        :param int position: Track position in microseconds.
                             This must be between 0 and <track_length>.

        If the Position argument is less than 0, do nothing.
        If the Position argument is greater than the track length, do nothing.
        If the CanSeek property is false, this has no effect.
        """
        self.iface.SetPosition(convert2dbus(track_id, 'o'),
                               convert2dbus(position, 'x'))