Hold this during a series of renames to delay ndef
        secondary property processing until the end....

async def delayNdefProps(self):
        '''
        Hold this during a series of renames to delay ndef
        secondary property processing until the end....
        '''
        async with self.getTempSlab() as slab:

            seqn = s_slabseqn.SlabSeqn(slab, 'ndef')

            self.ndefdelay = seqn

            yield

            self.ndefdelay = None

            logger.info(f'Processing {seqn.index()} delayed values.')

            # process them all now...
            for i, (oldv, newv) in seqn.iter(0):
                await self.editNdefProps(oldv, newv)

                if i and i % _progress == 0:
                    logger.info(f'Processed {i} delayed values.')