code: async def storPropSet(self, buid, prop, valu):
          '''
          Migration-only function
          '''
          assert self.buidcache.disabled
  
          indx = prop.type.indx(valu)
          if indx is not None and len(indx) > MAX_INDEX_LEN:
              mesg = 'index bytes are too large'
              raise s_exc.BadIndxValu(mesg=mesg, prop=prop, valu=valu)
  
          univ = prop.utf8name[0] in (46, 35) # leading . or #
          bpkey = buid + prop.utf8name
  
          self._storPropSetCommon(buid, prop.utf8name, bpkey, prop.pref, univ, valu, indxync def storPropSet(self, buid, prop, valu):
          '''
          Migration-only function
          '''
          assert self.buidcache.disabled
  
          indx = prop.type.indx(valu)
          if indx is not None and len(indx) > MAX_INDEX_LEN:
              mesg = 'index bytes are too large'
              raise s_exc.BadIndxValu(mesg=mesg, prop=prop, valu=valu)
  
          univ = prop.utf8name[0] in (46, 35) # leading . or #
          bpkey = buid + prop.utf8name
  
          self._storPropSetCommon(buid, prop.utf8name, bpkey, prop.pref, univ, valu, indx)
docs: Migration-only function