# Pastebin OFnExV0G
    def manage_existing_snapshot(self, snapshot, driver_options,
                                 share_server=None):
        """Manages a snapshot that exists only in HNAS.

        The snapshot to be managed should be in the path
        /snapshots/SHARE_ID/SNAPSHOT_ID. Also, the size of snapshot should be
        provided as --driver_options size=<size>.

        :param snapshot: snapshot that will be managed.
        :param driver_options: expects only one key 'size'. It must be
               provided in order to manage a snapshot.
        :param share_server: Data structure with share server information. Not
               used by this driver.
        :returns: Returns a dict with size of snapshot managed
        """
        try: