'Get available and used capacity info for the NFS share.'

def _get_share_capacity_info(self):

    lcfg = self.configuration
    share_details = self.zfssa.get_share(lcfg.zfssa_nfs_pool, lcfg.zfssa_nfs_project, lcfg.zfssa_nfs_share)
    free = share_details['space_available']
    used = share_details['space_total']
    return (free, used)
