docs: def _clear_maximum_terms(self, match_key):
          """clears maximum match_key term values"""
          try:  # clear match = True case
              del self._query_terms[match_key]['$lte']
          except KeyError:
              pass
          try:  # clear match = False case
              del self._query_terms[match_key]['$gt']
          except KeyError:
              pass
          try:
              if self._query_terms[match_key] == {}:
                  del self._query_terms[match_key]
          except KeyError:
              pass