code: func (d *driver) PutContent(ctx context.Context, path string, contents []byte) error {
  	err := d.Conn.ObjectPutBytes(d.Container, d.swiftPath(path), contents, contentType)
  	if err == swift.ObjectNotFound {
  		return storagedriver.PathNotFoundError{Path: path}
  	}
  	return err
  }
docs: // PutContent stores the []byte content at a location designated by "path".