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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def time_stats(self, **kwargs):
 """Get time stats for the object. Args: **kwargs: Extra options to send to the server (e.g. sudo) Raises: GitlabAuthenticationError: If authentication is not correct GitlabTimeTrackingError: If the time tracking update cannot be done """

        # Use the existing time_stats attribute if it exist, otherwise make an
        # API call
        if 'time_stats' in self.attributes:
            return self.attributes['time_stats']

        path = '%s/%s/time_stats' % (self.manager.path, self.get_id())
        return self.manager.gitlab.http_get(path, **kwargs)