'Return details about the given volume attachment.
For a full list of available parameters, please refer to the official
API reference:
https://developer.openstack.org/api-ref/compute/#show-a-detail-of-a-volume-attachment'

def show_volume_attachment(self, server_id, volume_id):

    (resp, body) = self.get(('servers/%s/os-volume_attachments/%s' % (server_id, volume_id)))
    body = json.loads(body)
    self.validate_response(schema.show_volume_attachment, resp, body)
    return rest_client.ResponseBody(resp, body)
