code: def _match_minimum_date_time(self, match_key, date_time_value, match=True):
          
          if match:
              gtelt = '$gte'
          else:
              gtelt = '$lt'
          if match_key in self._query_terms:
              self._query_terms[match_key][gtelt] = date_time_value
          else:
              self._query_terms[match_key] = {gtelt: date_time_value}
docs: Matches a minimum date time value