def attach(self, instance_id, device):
        return self.connection.attach_volume(self.id, instance_id, device)
Gives a sequence of scalar symbols to mirror these expressions
dataset/ETHPy150Open darcyliu/storyboard/boto/ec2/volume.py/Volume.attach--crossover with--dataset/ETHPy150Open blaze/blaze/blaze/expr/broadcast.py/scalar_symbols