def set_close_exec(fd):
    raise NotImplementedError()
Returns a cascaded union of this MultiPolygon.
dataset/ETHPy150Open CouchPotato/CouchPotatoServer/libs/tornado/platform/interface.py/set_close_exec--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/contrib/gis/geos/collections.py/MultiPolygon.cascaded_union