code: def attach(self, instance_id, device):
          
          return self.connection.attach_volume(self.id, instance_id, device)
docs: Attach this EBS volume to an EC2 instance.
  
          :type instance_id: str
          :param instance_id: The ID of the EC2 instance to which it will
                              be attached.
  
          :type device: str
          :param device: The device on the instance through which the
                         volume will be exposed (e.g. /dev/sdh)
  
          :rtype: bool
          :return: True if successful