'Returns the list of volume attachments for a given instance.
For a full list of available parameters, please refer to the official
API reference:
https://developer.openstack.org/api-ref/compute/#list-volume-attachments-for-an-instance'

def list_volume_attachments(self, server_id):

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