def fetch_storage_volume(self, uri):
        raise NotImplementedError()

    ##### Storage Volumes #####
Construct a BaseChart object.
dataset/ETHPy150Open bmbouter/Opus/opus/lib/prov/deltacloud_old/deltacloud.py/Deltacloud.fetch_storage_volume--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/_internal/graphy/common.py/BaseChart.__init__