@property
    def prefixes(self):

        if not hasattr(self, '_prefixes'):
            self._prefixes = getattr(settings, 'NO_TRACKING_PREFIXES', [])

            if not getattr(settings, '_FREEZE_TRACKING_PREFIXES', False):
                for name in ('MEDIA_URL', 'STATIC_URL'):
                    url = getattr(settings, name)
                    if url and url != '/':
                        self._prefixes.append(url)

                try:
                    # finally, don't track requests to the tracker update pages
                    self._prefixes.append(reverse('tracking-refresh-active-users'))
                except NoReverseMatch:
                    # django-tracking hasn't been included in the URLconf if we
                    # get here, which is not a bad thing
                    pass

                settings.NO_TRACKING_PREFIXES = self._prefixes
                settings._FREEZE_TRACKING_PREFIXES = True

        return self._prefixes
:param var:  Variable Object
dataset/ETHPy150Open bashu/django-tracking/tracking/middleware.py/VisitorTrackingMiddleware.prefixes--crossover with--dataset/ETHPy150Open ODM2/ODMToolsPython/odmtools/odmservices/series_service.py/SeriesService.create_variable_by_var