def _existing_terms(self, ixreader, termset, reverse=False, phrases=True):
        fieldname = self.fieldname
        for word in self._words(ixreader):
            t = (fieldname, word)
            contains = t in ixreader
            if reverse: contains = not contains
            if contains:
                termset.add(t)
dataset/ETHPy150Open dokipen/whoosh/src/whoosh/query.py/MultiTerm._existing_terms/original