def _setting(self, key, default):
        env = 'STATSD_{}'.format(key).upper()
        return self._settings.get(key, os.environ.get(env, default))
Returns a sequence of all icons in each map of the set.
dataset/ETHPy150Open gmr/rejected/rejected/statsd.py/StatsdClient._setting--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/gis/maps/google/gmap.py/GoogleMapSet.icons