def _existing_terms(self, ixreader, termset, reverse=False, phrases=True):
        fieldname, text = self.fieldname, self.text
        fieldnum = ixreader.fieldname_to_num(fieldname)
        contains = (fieldnum, text) in ixreader
        if reverse: contains = not contains
        if contains:
            termset.add((fieldname, text))
dataset/ETHPy150Open dokipen/whoosh/src/whoosh/query.py/Term._existing_terms/original