def set_metadata(self, metadata, clear=False, prefix=None):
        return self.manager.set_metadata(self, metadata, clear=clear,
                prefix=prefix)
Makes sure self.droot, self.impact, and self.root_destroyer are up to
dataset/ETHPy150Open rackspace/pyrax/pyrax/object_storage.py/StorageObject.set_metadata--crossover with--dataset/ETHPy150Open rizar/attention-lvcsr/libs/Theano/theano/gof/destroyhandler.py/DestroyHandler.refresh_droot_impact