code: def getfnc_qual_ev(self):
          
          fnc_key = (
              self.nd_not2desc[(self._keep_nd, self._keep_not)],
              self.incexc2num[(
                  self.include_evcodes is not None,
                  self.exclude_evcodes is not None)],
          )
          return self.param2fnc[fnc_key]
docs: Keep annotaion if it passes potentially modified selection.